Try do the following.
Go to the tab where you have your DataSource. Click "Convert to Formula" and copy 2nd parameter you have in that formula. Paste it in your formula instead of CC_SUBCAT_Y1V1 (3rd parameter).
Now try saving.
Try do the following.
Go to the tab where you have your DataSource. Click "Convert to Formula" and copy 2nd parameter you have in that formula. Paste it in your formula instead of CC_SUBCAT_Y1V1 (3rd parameter).
Now try saving.