In your description you have mentioned as
Release Group: PR
Release Code: D2-Supply Chain Manager
D5-Engineering Manager
D6-Sales Manager
What is the release strategy ? - say it is RS as release strategy
confirm whether ,
1. How many characteristic assigned in the release strategy - check each characteristic value using CL20N
If you create a new release strategy , then delete/ remove the characteristic value of the excisting release strategy.
for the new release strategy ,assign characteristic value using CL20N.
2.Please remember , if have 3 characteristic for a release strategy , then all the characteristic values to be met , then only the release strategy triggers
reply if you have any doubts.