Hi Emily,
The error is for posting variant 0001 not for HCRD. You can see the error message, it is showing error for posting variant 0001.
You can check global parameter of your company code. I assume you have assigned 0001 posting variant to your company code. Either change that parameter from 0001 to HCRD or open the period for posting variant 0001.
Regards,
Ankit K. Agarwal