exception 26

Hi

I'm searching the forum for similar discussions and tried program SDRQCR21 already but no luck.

there is a requirement from sales order for 59 pc and a production order exists arleady to supply 59. but still MRP is proposing a new plnd order for 59 pc which leads to an excess of 59 finally. I've tried to delete the production order and run MRP and nothing is proposed, which is good. then I convert the plnd order to a production order and run MRP, again a new plnd order is created. what can be wrong here?

kljf