That was a big problem with WKRP in syndication, they had to replace a lot of the songs because of Royalty issues.
For a while, they did that to the first one or two seasons of Happy Days because it played Bill Haley’s Rock Around the Clock (glued the later theme over the intro). And that was one of the reasons why that show’s earlier episodes were far superior to the later years (particularly after Ron Howard and Don Most left the show).
Yup. Even the original soundtrack of the Equalizer by Stewart Copeland were removed. You have to get the VHS versions of it or DL from torrent..
Shout Factory put out a DVD set of the show that managed to get 75-80% of the original music. What they couldn’t get (”Dogs” by Pink Floyd) they came up with reasonable substitutions.