Problem When assembling parts

Hello guys,
When I try to open the assembly the parts I edited ( rack and pinion form the library) get back to their default states
And I noticed that when I keep the parts open simultaneously with the assembly it doesn't go back to default

1 Answer

Because you are using library files, it has specifications when saving the file name.
When you design the model, change the file name, then save it
I hope your problem is solved