No control record for activity type error message KL203

Hi Experts,

Happy new year.

I found a issue on costing run with error message NO：KL023 via CK11N.It shows that no price for the activity type.Also,I can not mark the standard price via CK24.

However,the price already maintained via KP26,and the price can be seen in KSBT.

And it was ok when the Qty structure date changed to 31.12.2020.It seems that the activity price not effective in the new year.That's quite strange.

It would be appreciated you can help.Much thanks.