diff --git a/backend/src/graphql/resolver/ContributionResolver.ts b/backend/src/graphql/resolver/ContributionResolver.ts
index 12da50ed0..45b3d2553 100644
--- a/backend/src/graphql/resolver/ContributionResolver.ts
+++ b/backend/src/graphql/resolver/ContributionResolver.ts
@@ -560,15 +560,18 @@ export class ContributionResolver {
     const contribution = await DbContribution.findOne(id)
     if (!contribution) {
       logger.error(`Contribution not found for given id: ${id}`)
+      releaseLock()
       throw new Error('Contribution not found to given id.')
     }
     if (contribution.confirmedAt) {
       logger.error(`Contribution already confirmd: ${id}`)
+      releaseLock()
       throw new Error('Contribution already confirmd.')
     }
     const moderatorUser = getUser(context)
     if (moderatorUser.id === contribution.userId) {
       logger.error('Moderator can not confirm own contribution')
+      releaseLock()
       throw new Error('Moderator can not confirm own contribution')
     }
     const user = await DbUser.findOneOrFail(
@@ -577,6 +580,7 @@ export class ContributionResolver {
     )
     if (user.deletedAt) {
       logger.error('This user was deleted. Cannot confirm a contribution.')
+      releaseLock()
       throw new Error('This user was deleted. Cannot confirm a contribution.')
     }
     const creations = await getUserCreation(contribution.userId, clientTimezoneOffset, false)