system message saying open PR when TECO work order

Hello Guru,

I have got a question about this message by system.

I creat one operation and in this operation, there is one purchase requisition. Later, I deleted this operation, so this PR got deletion flag naturally. But when I want to teco this work order, system saying that there is still open PR, and would you like to teco it? Of course I can ignore this message, but with my understanding, this is not correct, since this PR is set deletion flag after I delete this flag.

Any ideas on this? Is it system standard behavior? Appreciate your ideas.

BR,

MG