Function was canceled

What causes this issue?

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

System Response

An internal event is to be deleted. This is only allowed if an 'OTHERS'
event has been defined for the assigned step or there is only one
event.

How to fix this error?

Check your entry is correct.
If your entry is correct, an 'OTHERS' event is not defined for the
assigned step. Define an 'OTHERS' event.

Error message extract from SAP system. Copyright SAP SE.