[SAP ARIBA] CSM_User_Insert error : Erorr while doing JIT creation

Hello, 

I've created a SCIM connector with SAP ARIBA, which is a cloud application.

The full synchronisation works well with Inserting/Updating/Deleting.

We tried to implement the standard process CSM_User_Insert, in order to perfom JIT creation.

The "Insert" process is generated, however we could not solve the error below. 

The error message is talking about an invalid filter value, but I couldn't find to what it coresponds. 

If anyone have already faced the same issue, a feedback would be greatly appreciated. 

ErrorMessages (2023-12-11 17:32:41.700) [1777018] Error running synchronization project (SCIM Synchronization (SAP Ariba))'s workflow (Provisioning from 1IM to Ariba).
[1777124] Error running synchronization step (Provisioning from 1IM to Ariba) of synchronization configuration (Provisioning from 1IM to Ariba (Provisioning)).
[1777028] Error loading a system object using its prototype (SJPLABOR (SJP Laboratorio)).
[1777384] : Error while reading User objects with properties (vrtdistinguishedName@User, active@User, displayName@User, emails~value@User, userName@User, urn:ietf:params:scim:schemas:extension:enterprise:2.0:User~manager~value@User, id@User, meta~vrtIDandType@User, vrtcanonicalName@User, vrtparentDn@User).
[System.Exception] {"schemas":["urn:ietf:params:scim:api:messages:2.0:Error"],"detail":"Invalid filter value.","status":422}