Diagnosis
You have entered both a valid from date and a technical status.However, you are only allowed to enter one of these.
When you create a change number, you must define which objects thischange master can be used for. Objects can only have one of these formsof effectivity, too.

Procedure
Decide on one of the forms of effectivity.
Remove the other entry by entering the cancel character "!" at thebeginning of the appropriate field: either Valid from orTech status from.