diff --git a/backend/src/config/index.ts b/backend/src/config/index.ts
index ec469c183..df3e20648 100644
--- a/backend/src/config/index.ts
+++ b/backend/src/config/index.ts
@@ -10,7 +10,7 @@ Decimal.set({
 })
 
 const constants = {
-  DB_VERSION: '0037-add_contribution_links_table/ContributionLinks',
+  DB_VERSION: '0037-add_contribution_links_table',
   DECAY_START_TIME: new Date('2021-05-13 17:46:31-0000'), // GMT+0
   LOG4JS_CONFIG: 'log4js-config.json',
   // default log level on production should be info
@@ -54,6 +54,7 @@ const community = {
   COMMUNITY_URL: process.env.COMMUNITY_URL || 'http://localhost/',
   COMMUNITY_REGISTER_URL: process.env.COMMUNITY_REGISTER_URL || 'http://localhost/register',
   COMMUNITY_REDEEM_URL: process.env.COMMUNITY_REDEEM_URL || 'http://localhost/redeem/{code}',
+  COMMUNITY_CONTRIBUTION_URL: process.env.COMMUNITY_CONTRIBUTION_URL || 'http://localhost/redeem/CL-{code}',
   COMMUNITY_DESCRIPTION:
     process.env.COMMUNITY_DESCRIPTION || 'Die lokale Entwicklungsumgebung von Gradido.',
 }