I was playing Space Age and I had the green Space Age turbo belts in some blueprints, and then started a run with Bob's Logistics enabled. After reverting back to a Space Age save without Bob's Logistics on, all my blueprints that had Space Age turbo belts consider those belts to be modded content. Can that be fixed? Thanks!

same happend to me, all my blueprint that contained space age turbo belts are now broken and no longer usable without Bob's Logistic enabled

only way around this is to enable the mod, downgrade everything down to express then upgrade them again once the mod is disable

but also doing it this way will break any belt weaving, hope there can be a fix for this

aint fun to have all my space age blueprints ruined due to this "bug"

I'm pretty sure I know what is causing this. Yes, I'll get it fixed soon!

Dear respected author,I have spent 4000 hours playing Factorio and have always enjoyed creating blueprints in the vanilla, mod-free version of the game. However, I recently joined a friend's server and played with Bob's mods for just two hours before disabling them right away. Unfortunately, more than half of the blueprints in my blueprint library became corrupted.
If possible, I hope you can add a warning on the mod's description page that says:"This mod may damage local blueprint books."
The blueprints I created throughout last year are almost completely ruined. After removing Bob's mods, the number of code lines in my blueprint files was cut directly in half. Many conveyor belt entities were deleted when Bob's mods were disabled, leaving only their positional data.
I expect it will take me a huge amount of time to fix all the blueprints again this year. It’s hard to imagine how many players will run into similar issues after version 2.0 comes out.I hope you can resolve this problem as soon as possible.