Diagnosis
You are attempting to delete the assignment of a standard agreement foronly part of its existing validity. The assignment starts before thestart and ends after the end of the selected change interval.

System Response
The system does not allow this change in a single step.

Procedure
You must carry out this change in two steps. In the first step, youdelete the assignment from the start of the required change interval tothe end of the assignment, and then activate this change.
In the second step, you create a new assignment that starts at the endof the required change interval and ends at the end of the assignmentthat now exists.