System not changing the G/L account when material group is changed in Pr

Question

Hi Experts,
Issue- System not changing the G/L account when material group is changed in Purchase requistion.
Process followed:
1. Create Service Pr with material group 5040 which is assigned to valuation class 3511 and 3511 is assigned to g/l account 51370000
2. Changed Service PR material group from 5040 to 5050. 5050 is assigned to valuation class 3512 and 3512 is assigned to G/L account 51260000
The issue is when we changed the material group from 5040 to 5050 system is not picking the g/l account which is assigned to 5050 i.e. 51260000
instead the g/l remains remains as before which is there for 5040 i.e. 51370000
Please let me know how can we resolve this problem and pick the correct g/l. Please find the attachments
Regards
Badri

Answer 1

Hello Badari,
if you are using the item category D "Services", explanation from note  663983 - ME22(N), ME52(N): No new G/L account from material group applies:
Please consider the following:
You can maintain the material group both at item level and at service line level. If you subsequently change the material group at item level, the material groups remain unchanged in the services. As a result, the G/L account is not redetermined at service line level.
In order for the G/L account to be redetermined, you must explicitly change the material group in the service line.
Kind Regards
TomT