Dods: Cascade delete problem

Hi,

I read some old post but I still cannot get out my problem:
I have 2 tables:
Table A:   IDA,  IDB, field1, field2,...
Table B:   IDB,  IDA, field1, field2,...

and i use referenceobject:  TableA. IDB --> TableB.IDB   and  TableA.IDB 
--> TableB. IDA

If I try to delete a row from table B for example, DODS delete also the 
table A rows that have references to the old IDB.
How can I disable this behavior?

I looked in the dods conf property doc but I can't find a solution.

Any idea or help?

Thanks

Eric