When requesting new Absence Type (1010 - Casual Leave , corresponding Absence Quota is 20 - Annual Leave Quota), although pressing ENTER Key, it's still fine, however saving error is coming: "No absence quota type 2/11/40 on ...."
II. Root cause
There are differences between list Absence Quota last Personnel Area with current Personnel Area. Look at 2 pictures below for more details:
Correction the period of Absence Quotas:
After unifying, you can apply Absence as normally.
Note: If the above solution doesn't resolve this issue, you can try another solution:
1. Using T-code PU00
2. Delete cluster B1 and B2
3. Regenerated Absence Quota.