Scheduling agreement MRP run
We use Scheduling agreements for purchasing spare parts. The nightly MRP run checks the warehouse requirements and creates delivery schedule line to scheduling agreement.
Now the MRP run creates unnecessary delivery schedule lines to scheduling agreement if the earlier created delivery schedule line's delivery date has been changed manually.
Today the MRP run finds requirement for article XYZ and creates the delivery schedule line, where delivery date is 2.9.2008 (determined from articles basic data).
The Vendor confirms the delivery date as 3.10.2008 and the purchaser changes manually (transaction ME38) the delivery date to delivery schedule line accordingly and prints the created message.
The next MRP run creates new delivery schedule line, where delivery date is again 2.9.2008.
After that there are two open delivery schedule lines for article XYZ with delivery dates 3.10.2008 and 2.9.2008.
Why the MRP run does not notice the existing delivery schedule line with the new delivery date 3.10.2008?