Diagnosis
Several locks are already simultaneously active in at least one of theitems selected. In this case a new lock cannot be set by entering a newvalue. (The lock field is also not ready for input in the upper part ofthe screen.)
Use the pushbutton Lock in the pushbutton bar to set locks forsuch items. Or even better, define the appropriate pushbuttons in theline layout, for example, next to the lock field itself, in Customizing.
Then you decide in the following dialog whether you want to set a newadditional lock or whether a new lock should replace all of the lockspreviously defined. To do this you first delete the locks alreadydefined and then create the new ones.