diff --git a/backend/src/graphql/resolver/AdminResolver.test.ts b/backend/src/graphql/resolver/AdminResolver.test.ts
index eb1edf978..2dd9b837f 100644
--- a/backend/src/graphql/resolver/AdminResolver.test.ts
+++ b/backend/src/graphql/resolver/AdminResolver.test.ts
@@ -1807,9 +1807,7 @@ describe('AdminResolver', () => {
               }),
             )
           })
-        })
 
-        describe('createContributionLink', () => {
           it('returns an error if missing startDate', async () => {
             await expect(
               mutate({
@@ -1827,9 +1825,7 @@ describe('AdminResolver', () => {
               }),
             )
           })
-        })
 
-        describe('createContributionLink', () => {
           it('returns an error if missing endDate', async () => {
             await expect(
               mutate({
@@ -1845,9 +1841,7 @@ describe('AdminResolver', () => {
               }),
             )
           })
-        })
 
-        describe('createContributionLink', () => {
           it('returns an error if endDate is before startDate', async () => {
             await expect(
               mutate({
@@ -1861,16 +1855,12 @@ describe('AdminResolver', () => {
             ).resolves.toEqual(
               expect.objectContaining({
                 errors: [
-                  new GraphQLError(
-                    `The validFrom=2022-06-18T00:00:00.001Z must be before or equals the validTo=2022-06-18T00:00:00.000Z!`,
-                  ),
+                  new GraphQLError(`The value of validFrom must before or equals the validTo!`),
                 ],
               }),
             )
           })
-        })
 
-        describe('createContributionLink', () => {
           it('returns an error if name is an empty string', async () => {
             await expect(
               mutate({
@@ -1886,9 +1876,7 @@ describe('AdminResolver', () => {
               }),
             )
           })
-        })
 
-        describe('createContributionLink', () => {
           it('returns an error if name is shorter than 5 characters', async () => {
             await expect(
               mutate({
@@ -1902,15 +1890,13 @@ describe('AdminResolver', () => {
               expect.objectContaining({
                 errors: [
                   new GraphQLError(
-                    'The name=123 with a length of 3 did not fulfill the requested bounderies min=5 and max=100',
+                    `The value of 'name' with a length of 3 did not fulfill the requested bounderies min=5 and max=100`,
                   ),
                 ],
               }),
             )
           })
-        })
 
-        describe('createContributionLink', () => {
           it('returns an error if name is longer than 100 characters', async () => {
             await expect(
               mutate({
@@ -1924,15 +1910,13 @@ describe('AdminResolver', () => {
               expect.objectContaining({
                 errors: [
                   new GraphQLError(
-                    'The name=12345678901234567892123456789312345678941234567895123456789612345678971234567898123456789912345678901 with a length of 101 did not fulfill the requested bounderies min=5 and max=100',
+                    `The value of 'name' with a length of 101 did not fulfill the requested bounderies min=5 and max=100`,
                   ),
                 ],
               }),
             )
           })
-        })
 
-        describe('createContributionLink', () => {
           it('returns an error if memo is an empty string', async () => {
             await expect(
               mutate({
@@ -1948,9 +1932,7 @@ describe('AdminResolver', () => {
               }),
             )
           })
-        })
 
-        describe('createContributionLink', () => {
           it('returns an error if memo is shorter than 5 characters', async () => {
             await expect(
               mutate({
@@ -1964,15 +1946,13 @@ describe('AdminResolver', () => {
               expect.objectContaining({
                 errors: [
                   new GraphQLError(
-                    'The memo=123 with a length of 3 did not fulfill the requested bounderies min=5 and max=255',
+                    `The value of 'memo' with a length of 3 did not fulfill the requested bounderies min=5 and max=255`,
                   ),
                 ],
               }),
             )
           })
-        })
 
-        describe('createContributionLink', () => {
           it('returns an error if memo is longer than 255 characters', async () => {
             await expect(
               mutate({
@@ -1986,15 +1966,13 @@ describe('AdminResolver', () => {
               expect.objectContaining({
                 errors: [
                   new GraphQLError(
-                    'The memo=1234567890123456789212345678931234567894123456789512345678961234567897123456789812345678991234567890123456789012345678921234567893123456789412345678951234567896123456789712345678981234567899123456789012345678901234567892123456789312345678941234567895123456 with a length of 256 did not fulfill the requested bounderies min=5 and max=255',
+                    `The value of 'memo' with a length of 256 did not fulfill the requested bounderies min=5 and max=255`,
                   ),
                 ],
               }),
             )
           })
-        })
 
-        describe('createContributionLink', () => {
           it('returns an error if amount is not positive', async () => {
             await expect(
               mutate({
diff --git a/backend/src/graphql/resolver/AdminResolver.ts b/backend/src/graphql/resolver/AdminResolver.ts
index 3cb6cb9f6..dca35ebaf 100644
--- a/backend/src/graphql/resolver/AdminResolver.ts
+++ b/backend/src/graphql/resolver/AdminResolver.ts
@@ -179,7 +179,6 @@ export class AdminResolver {
     @Args() { email, amount, memo, creationDate }: AdminCreateContributionArgs,
     @Ctx() context: Context,
   ): Promise<Decimal[]> {
-    logger.trace('adminCreateContribution...')
     const user = await dbUser.findOne({ email }, { withDeleted: true })
     if (!user) {
       throw new Error(`Could not find user with email: ${email}`)
@@ -520,13 +519,7 @@ export class AdminResolver {
       maxPerCycle,
     }: ContributionLinkArgs,
   ): Promise<ContributionLink> {
-    logger.debug(
-      `createContributionLink(validFrom=${validFrom}, validTo=${validTo}, name=${name}, amount=${amount}, memo=${memo}, cycle=${cycle}, maxPerCycle=${maxPerCycle}, maxAmountPerMonth=${maxAmountPerMonth})...`,
-    )
-    if (!isStartEndDateValid(validFrom, validTo)) {
-      logger.error(`The validFrom=${validFrom} must be before or equals the validTo=${validTo}!`)
-      throw new Error(`The validFrom=${validFrom} must be before or equals the validTo=${validTo}!`)
-    }
+    isStartEndDateValid(validFrom, validTo)
     if (!name) {
       logger.error(`The name must be initialized!`)
       throw new Error(`The name must be initialized!`)
@@ -535,7 +528,7 @@ export class AdminResolver {
       name.length < CONTRIBUTIONLINK_NAME_MIN_CHARS ||
       name.length > CONTRIBUTIONLINK_NAME_MAX_CHARS
     ) {
-      const msg = `The name=${name} with a length of ${name.length} did not fulfill the requested bounderies min=${CONTRIBUTIONLINK_NAME_MIN_CHARS} and max=${CONTRIBUTIONLINK_NAME_MAX_CHARS}`
+      const msg = `The value of 'name' with a length of ${name.length} did not fulfill the requested bounderies min=${CONTRIBUTIONLINK_NAME_MIN_CHARS} and max=${CONTRIBUTIONLINK_NAME_MAX_CHARS}`
       logger.error(`${msg}`)
       throw new Error(`${msg}`)
     }
@@ -547,7 +540,7 @@ export class AdminResolver {
       memo.length < CONTRIBUTIONLINK_MEMO_MIN_CHARS ||
       memo.length > CONTRIBUTIONLINK_MEMO_MAX_CHARS
     ) {
-      const msg = `The memo=${memo} with a length of ${memo.length} did not fulfill the requested bounderies min=${CONTRIBUTIONLINK_MEMO_MIN_CHARS} and max=${CONTRIBUTIONLINK_MEMO_MAX_CHARS}`
+      const msg = `The value of 'memo' with a length of ${memo.length} did not fulfill the requested bounderies min=${CONTRIBUTIONLINK_MEMO_MIN_CHARS} and max=${CONTRIBUTIONLINK_MEMO_MAX_CHARS}`
       logger.error(`${msg}`)
       throw new Error(`${msg}`)
     }
@@ -581,7 +574,6 @@ export class AdminResolver {
     @Args()
     { currentPage = 1, pageSize = 5, order = Order.DESC }: Paginated,
   ): Promise<ContributionLinkList> {
-    logger.debug('listContributionLinks()...')
     const [links, count] = await DbContributionLink.findAndCount({
       order: { createdAt: order },
       skip: (currentPage - 1) * pageSize,
@@ -596,7 +588,6 @@ export class AdminResolver {
   @Authorized([RIGHTS.DELETE_CONTRIBUTION_LINK])
   @Mutation(() => Date, { nullable: true })
   async deleteContributionLink(@Arg('id', () => Int) id: number): Promise<Date | null> {
-    logger.debug(`deleteContributionLink(id=${id})`)
     const contributionLink = await DbContributionLink.findOne(id)
     if (!contributionLink) {
       logger.error(`Contribution Link not found to given id: ${id}`)
@@ -624,9 +615,6 @@ export class AdminResolver {
     }: ContributionLinkArgs,
     @Arg('id', () => Int) id: number,
   ): Promise<ContributionLink> {
-    logger.debug(
-      `updateContributionLink(id=${id}, amount=${amount}, name=${name}, memo=${memo}, cycle=${cycle}, validFrom=${validFrom}, validTo=${validTo}, maxAmountPerMonth=${maxAmountPerMonth}, maxPerCycle=${maxPerCycle})...`,
-    )
     const dbContributionLink = await DbContributionLink.findOne(id)
     if (!dbContributionLink) {
       logger.error(`Contribution Link not found to given id: ${id}`)
@@ -735,10 +723,10 @@ export const isContributionValid = (
   return true
 }
 
-function isStartEndDateValid(
+const isStartEndDateValid = (
   startDate: string | null | undefined,
   endDate: string | null | undefined,
-) {
+): void => {
   if (!startDate) {
     logger.error('Start-Date is not initialized. A Start-Date must be set!')
     throw new Error('Start-Date is not initialized. A Start-Date must be set!')
@@ -751,9 +739,9 @@ function isStartEndDateValid(
 
   // check if endDate is before startDate
   if (new Date(endDate).getTime() - new Date(startDate).getTime() < 0) {
-    return false
+    logger.error(`The value of validFrom must before or equals the validTo!`)
+    throw new Error(`The value of validFrom must before or equals the validTo!`)
   }
-  return true
 }
 
 const getCreationMonths = (): number[] => {