M2EE error while starting application

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Hi,   we are running a mendix application on SAP BTP and after the db has been upgraded from postgresql 9.6 ==> 12 we are getting the following error when starting the application:    ERROR - M2EE: An error occurred while initializing the Runtime: value/key is already used 3 Jul 2023, 13:15:18 (GMT+02:00) STDOUT [APP/PROC/WEB/0] ERROR - M2EE: com.mendix.m2ee.api.AdminException: An error occurred while initializing the Runtime: value/key is already used   any thoughts on what this means?
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