SAP Message AA956 - Investment key & is not valid on &

Diagnosis
The capitalization date &V2& is not in the validity period from &V3& toV4 for investment support key v1.

Procedure
a. You have used the wrong investment key. Correct this.
b. The investment key &V1& is correct.
Confirm this by pressing ENTER.
b.1 Check the definition of the validity period for the investment keyV1 and correct it if necessary.
or
b.2 Enter an capitalization date &V2& within the validity period from
V3 to v4.