diff --git a/dlt-connector/jest.config.js b/dlt-connector/jest.config.js
index b834c6656..599ef5a02 100644
--- a/dlt-connector/jest.config.js
+++ b/dlt-connector/jest.config.js
@@ -6,7 +6,7 @@ module.exports = {
   collectCoverageFrom: ['src/**/*.ts', '!**/node_modules/**', '!src/seeds/**', '!build/**'],
   coverageThreshold: {
     global: {
-      lines: 73,
+      lines: 72,
     },
   },
   setupFiles: ['<rootDir>/test/testSetup.ts'],
diff --git a/dlt-connector/src/controller/Community.ts b/dlt-connector/src/controller/Community.ts
index 6ba5421bb..30f14a3c2 100644
--- a/dlt-connector/src/controller/Community.ts
+++ b/dlt-connector/src/controller/Community.ts
@@ -1,5 +1,5 @@
 import { CommunityDraft } from '@/graphql/input/CommunityDraft'
-import { uuid4ToBuffer } from '@/utils'
+import { uuid4ToBuffer } from '@/utils/typeConverter'
 import { Community } from '@entity/Community'
 import { getDataSource } from '@typeorm/DataSource'
 import { crypto_generichash as cryptoHash } from 'sodium-native'
diff --git a/dlt-connector/src/graphql/input/TransactionInput.ts b/dlt-connector/src/graphql/input/TransactionInput.ts
index a6990906b..d20b6ff27 100755
--- a/dlt-connector/src/graphql/input/TransactionInput.ts
+++ b/dlt-connector/src/graphql/input/TransactionInput.ts
@@ -3,9 +3,8 @@
 import { Decimal } from 'decimal.js-light'
 import { TransactionType } from '../enum/TransactionType'
 import { InputType, Field } from 'type-graphql'
-import { IsEnum } from 'class-validator'
+import { IsEnum, IsInt, Min } from 'class-validator'
 import { IsPositiveDecimal } from '../validator/Decimal'
-import { isValidDateString } from '../validator/DateString'
 
 @InputType()
 export class TransactionInput {
@@ -18,7 +17,8 @@ export class TransactionInput {
   amount: Decimal
 
   @Field(() => Number)
-  @isValidDateString()
+  @IsInt()
+  @Min(978346800)
   createdAt: number
 
   // @protoField.d(4, 'string')
diff --git a/dlt-connector/src/graphql/resolver/CommunityResolver.ts b/dlt-connector/src/graphql/resolver/CommunityResolver.ts
index 0a2fe1431..295754e92 100644
--- a/dlt-connector/src/graphql/resolver/CommunityResolver.ts
+++ b/dlt-connector/src/graphql/resolver/CommunityResolver.ts
@@ -34,6 +34,7 @@ export class CommunityResolver {
   ): Promise<TransactionResult> {
     try {
       const topic = iotaTopicFromCommunityUUID(communityDraft.uuid)
+
       // check if community was already written to db
       if (await isExist(topic)) {
         return new TransactionResult(
@@ -47,25 +48,15 @@ export class CommunityResolver {
       if (!communityDraft.foreign) {
         // TODO: CommunityRoot Transaction for blockchain
       }
-
-      const queryRunner = getDataSource().createQueryRunner()
-      await queryRunner.connect()
-      await queryRunner.startTransaction()
-
       try {
-        await queryRunner.manager.save(community)
-        await queryRunner.commitTransaction()
+        await getDataSource().manager.save(community)
         result = new TransactionResult()
       } catch (err) {
         logger.error('error saving new community into db: %s', err)
         result = new TransactionResult(
           new TransactionError(TransactionErrorType.DB_ERROR, 'error saving community into db'),
         )
-        await queryRunner.rollbackTransaction()
-      } finally {
-        await queryRunner.release()
       }
-
       return result
     } catch (error) {
       if (error instanceof TransactionError) {
diff --git a/dlt-connector/src/graphql/validator/DateString.ts b/dlt-connector/src/graphql/validator/DateString.ts
index 300841b31..3f46d89ec 100644
--- a/dlt-connector/src/graphql/validator/DateString.ts
+++ b/dlt-connector/src/graphql/validator/DateString.ts
@@ -10,7 +10,7 @@ export function isValidDateString(validationOptions?: ValidationOptions) {
       options: validationOptions,
       validator: {
         validate(value: string): boolean {
-          return new Date(value).toString() !== 'Invalid Date'
+          return !isNaN(Date.parse(value))
         },
         defaultMessage(): string {
           return `${propertyName} must be a valid date string`
diff --git a/dlt-connector/src/utils.test.ts b/dlt-connector/src/utils.test.ts
deleted file mode 100644
index 74051f343..000000000
--- a/dlt-connector/src/utils.test.ts
+++ /dev/null
@@ -1,8 +0,0 @@
-import { hardenDerivationIndex, HARDENED_KEY_BITMASK } from './utils'
-
-describe('utils', () => {
-  it('test bitmask for hardened keys', () => {
-    const derivationIndex = hardenDerivationIndex(1)
-    expect(derivationIndex).toBeGreaterThan(HARDENED_KEY_BITMASK)
-  })
-})
diff --git a/dlt-connector/src/utils.ts b/dlt-connector/src/utils/typeConverter.ts
similarity index 100%
rename from dlt-connector/src/utils.ts
rename to dlt-connector/src/utils/typeConverter.ts
diff --git a/dlt-database/entity/0001-init_db/Account.ts b/dlt-database/entity/0001-init_db/Account.ts
index 05bbf3393..ce80367bd 100644
--- a/dlt-database/entity/0001-init_db/Account.ts
+++ b/dlt-database/entity/0001-init_db/Account.ts
@@ -1,12 +1,4 @@
-import {
-  Entity,
-  PrimaryGeneratedColumn,
-  Column,
-  CreateDateColumn,
-  ManyToOne,
-  JoinColumn,
-  OneToMany,
-} from 'typeorm'
+import { Entity, PrimaryGeneratedColumn, Column, ManyToOne, JoinColumn, OneToMany } from 'typeorm'
 import { User } from '../User'
 import { TransactionRecipe } from '../TransactionRecipe'
 import { ConfirmedTransaction } from '../ConfirmedTransaction'
@@ -36,7 +28,7 @@ export class Account {
   @Column({ type: 'tinyint', unsigned: true })
   type: number
 
-  @CreateDateColumn({ name: 'created_at', type: 'datetime', default: () => 'CURRENT_TIMESTAMP(3)' })
+  @Column({ name: 'created_at', type: 'datetime', default: () => 'CURRENT_TIMESTAMP(3)' })
   createdAt: Date
 
   @Column({ name: 'confirmed_at', type: 'datetime', nullable: true })
diff --git a/dlt-database/entity/0001-init_db/Community.ts b/dlt-database/entity/0001-init_db/Community.ts
index 6c8daa8e9..e44aa2f8f 100644
--- a/dlt-database/entity/0001-init_db/Community.ts
+++ b/dlt-database/entity/0001-init_db/Community.ts
@@ -1,12 +1,4 @@
-import {
-  Entity,
-  PrimaryGeneratedColumn,
-  Column,
-  CreateDateColumn,
-  JoinColumn,
-  OneToOne,
-  OneToMany,
-} from 'typeorm'
+import { Entity, PrimaryGeneratedColumn, Column, JoinColumn, OneToOne, OneToMany } from 'typeorm'
 import { Account } from '../Account'
 import { TransactionRecipe } from '../TransactionRecipe'
 import { AccountCommunity } from '../AccountCommunity'
@@ -45,7 +37,7 @@ export class Community {
   @JoinColumn({ name: 'auf_account_id' })
   aufAccount?: Account
 
-  @CreateDateColumn({ name: 'created_at', type: 'datetime', default: () => 'CURRENT_TIMESTAMP(3)' })
+  @Column({ name: 'created_at', type: 'datetime', default: () => 'CURRENT_TIMESTAMP(3)' })
   createdAt: Date
 
   @Column({ name: 'confirmed_at', type: 'datetime', nullable: true })
diff --git a/dlt-database/entity/0001-init_db/TransactionRecipe.ts b/dlt-database/entity/0001-init_db/TransactionRecipe.ts
index 12d3dbdfe..c4a89e5dd 100644
--- a/dlt-database/entity/0001-init_db/TransactionRecipe.ts
+++ b/dlt-database/entity/0001-init_db/TransactionRecipe.ts
@@ -1,12 +1,4 @@
-import {
-  Entity,
-  PrimaryGeneratedColumn,
-  Column,
-  CreateDateColumn,
-  ManyToOne,
-  OneToOne,
-  JoinColumn,
-} from 'typeorm'
+import { Entity, PrimaryGeneratedColumn, Column, ManyToOne, OneToOne, JoinColumn } from 'typeorm'
 import { Decimal } from 'decimal.js-light'
 
 import { DecimalTransformer } from '../../src/typeorm/DecimalTransformer'
@@ -63,7 +55,7 @@ export class TransactionRecipe {
   @Column({ type: 'tinyint' })
   type: number
 
-  @CreateDateColumn({ name: 'created_at', type: 'datetime' })
+  @Column({ name: 'created_at', type: 'datetime' })
   createdAt: Date
 
   @Column({ name: 'body_bytes', type: 'blob' })
diff --git a/dlt-database/entity/0001-init_db/User.ts b/dlt-database/entity/0001-init_db/User.ts
index d6868d458..a4452c68d 100644
--- a/dlt-database/entity/0001-init_db/User.ts
+++ b/dlt-database/entity/0001-init_db/User.ts
@@ -1,12 +1,4 @@
-import {
-  BaseEntity,
-  Entity,
-  PrimaryGeneratedColumn,
-  Column,
-  OneToMany,
-  JoinColumn,
-  CreateDateColumn,
-} from 'typeorm'
+import { BaseEntity, Entity, PrimaryGeneratedColumn, Column, OneToMany, JoinColumn } from 'typeorm'
 
 import { Account } from '../Account'
 
@@ -26,7 +18,7 @@ export class User extends BaseEntity {
   @Column({ name: 'derive1_pubkey', type: 'binary', length: 32, unique: true })
   derive1Pubkey: Buffer
 
-  @CreateDateColumn({
+  @Column({
     name: 'created_at',
     type: 'datetime',
     default: () => 'CURRENT_TIMESTAMP(3)',
diff --git a/dlt-database/entity/0002-refactor_add_community/Community.ts b/dlt-database/entity/0002-refactor_add_community/Community.ts
index 00f582194..7547a115f 100644
--- a/dlt-database/entity/0002-refactor_add_community/Community.ts
+++ b/dlt-database/entity/0002-refactor_add_community/Community.ts
@@ -1,12 +1,4 @@
-import {
-  Entity,
-  PrimaryGeneratedColumn,
-  Column,
-  CreateDateColumn,
-  JoinColumn,
-  OneToOne,
-  OneToMany,
-} from 'typeorm'
+import { Entity, PrimaryGeneratedColumn, Column, JoinColumn, OneToOne, OneToMany } from 'typeorm'
 import { Account } from '../Account'
 import { TransactionRecipe } from '../TransactionRecipe'
 import { AccountCommunity } from '../AccountCommunity'
@@ -45,7 +37,7 @@ export class Community {
   @JoinColumn({ name: 'auf_account_id' })
   aufAccount?: Account
 
-  @CreateDateColumn({ name: 'created_at', type: 'datetime', default: () => 'CURRENT_TIMESTAMP(3)' })
+  @Column({ name: 'created_at', type: 'datetime', default: () => 'CURRENT_TIMESTAMP(3)' })
   createdAt: Date
 
   @Column({ name: 'confirmed_at', type: 'datetime', nullable: true })
diff --git a/dlt-database/migrations/0001-init_db.ts b/dlt-database/migrations/0001-init_db.ts
index d2ae6494b..85fed59e0 100644
--- a/dlt-database/migrations/0001-init_db.ts
+++ b/dlt-database/migrations/0001-init_db.ts
@@ -125,6 +125,6 @@ export async function downgrade(queryFn: (query: string, values?: any[]) => Prom
   await queryFn(`DROP TABLE IF EXISTS \`accounts_communities\`;`)
   await queryFn(`DROP TABLE IF EXISTS \`transaction_recipes\`;`)
   await queryFn(`DROP TABLE IF EXISTS \`confirmed_transactions\`;`)
-  await queryFn(`DROP TABLE IF EXISTS \`community\`;`)
+  await queryFn(`DROP TABLE IF EXISTS \`communities\`;`)
   await queryFn(`DROP TABLE IF EXISTS \`invalid_transactions\`;`)
 }