Sometimes you delete and sometimes you don't

I was doing some testing, to see what happens when our software runs on a Centera Cluster in the GE mode, as opposed to basic.

I connected to the public EMEA3 cluster using the emea3profile3_rdqew.pea file for credentials. When I was doing some rollback tests, I could not delete my clips, even though the pea says that I can delete, and the cluster information we print out says so as well. After some testing on a different server process, and some searching for possible answers, I tried again, and then it worked, what's happening here?

Here is the result from my tests at noon, I could write & read data, but it would fail on delete:

Oct 22 12:03:27 arts[4036:13] NOTE-1 File created

Oct 22 12:03:29 arts[4036:13] NOTE-1 File pre-committed

Oct 22 12:03:37 arts[4036:13] WARNING

    Device [store1:Centera] raised exception while performing method [DeleteFile]

        Could not delete file

            Delete failed [0:C0GTAJ8RCIR73e3FAR1EP9DFUQRG414HTDB0ED0D11FFGF7J88PD5]

                [-10204] [FP_OPERATION_NOT_ALLOWED] [The use of this operation is restricted (transid='VON1/22/DELETE_CLIP')]