It looks as though 1.5.1.-1 is in the main depository, and it is 1.5.1 that is in the beta depository.I see the same, presumably the -1 has been removed from the beta catalogue but a higher version hasn't been uploaded to the main catalogue
Done.So @af123 just needs to remove the old rs 1.5.1 package from the beta repository.
I am seeing the same on my boxes.I have had the ir package reporting an installed of 1.13 and an available of 1.12-1 on both my T2s