Each reservation in the PMS always has an Opera confirmation number. In addition, some reservations will also have TA_Ref numbers, but not all.
In Eleanor, we have two options:
1) We can always just look just at the Opera confirmation number, and ignore the TA_Ref number
2) We can check if the TA_Ref number is present: if YES, we use TA_Ref; if NO we use Opera Confirmation number.
With option 2, the TA_Ref is used INSTEAD of (not alongside) Opera confirmation number, so there will always be just one confirmation number that is 'valid', not both.
Please consider that guests booking via TA will only know of the TA_Ref number, so if you switch to option 1, those guest will not be able to log in using their TA_Ref and will need to obtain their Opera confirmation number from the reservations.