Thanks for your reply .
Yes , SAP backups using TDP for R3 and Oracle
I have four management class in policy domain where are MD , MDLOG1 , MDLOG2 and MDDEFAULT ( which is the default class ) and there archive set are set to unlimt.
But I have set the following in all the default class i.e in backup settting
1. Versions Data Exists = 7
2. Versions Data Deleted = 1
3. Retain Extra Versions = 0
4. Retain Only Version = 0
But still i have getting 8 , 9 or 10 version of database .
Any advice from your side?