The error is reported during synchronization if relevant BPMNTM diagrams were created but cannot be linked to the superior SAP function.
Error message
SAP function <Function name> was assigned a synchronization-relevant BPMNTM diagram. This diagram could not be linked because a BPMNTM diagram has already been assigned. Please check which assignment should be used in the future.
Cause
In ARIS, BPMNTM diagrams of the relevant model type may be assigned to an SAP function of a specific function type only once. There are multiple modes assigned.
Solution
Check whether the correct BPMNTM diagram is already assigned to the SAP function and delete the second, incorrect assignment.
If the assignment was created intentionally and is relevant to synchronization, ensure that the function type of the superior function matches the model type of the BPMNTM diagram and the SAP IDs specified are identical.