Did you remember to use the write protect feature on tapes you can't erase?
https://itstillworks.com/prevent-tapes-being-recorded-over-6664445.html has a tutorial.
Hello. I am using a vhs dvd combo player model DVW 7200. I was using a blank DVD +RW. In the process of trying to record my vhs to the blank dvd i fear that i might’ve done the opposite. Is that even possible?i played the vhs for a second to ensure there was content. And then i rewound it and pressed record while the blank dvd was in there at the same time. Now, when i try to play the vhs alone it is not playing at all. The VHSs i previously watched are still playing. Is it possible i overwrote my vhs with the blank dvd???