Instead of trying to fix it through the "Check this Entry" go back to the screen where you entered the 1099-B. Double-check the transaction. You can do one of two things or try one and if it does not work, try the next.
First, re-enter the acquisition date. If you have an actual date in the box, try using "various" instead. You can use "various" for the acquisition date.
If this does not correct the problem, then go back into the entry and delete the entry for this transaction. Then go back through and re-enter the transaction.
Hopefully, one of these two workarounds works to fix the loop that you are in.
