Minecraft villagers don't change jobs?

So in Minecraft I have 2 villagers in my house. I leveled them to max, but they didn't have what I wanted, so I wanted to change jobs. I dismantled their tables and placed others there and it easily passed 1 hour and nothing happened.

You have to wait until they lose their jobs and then place new tables.

You will never trade again once a single trade has been made

As far as I know, once you've traded with him, you can't change the job

but do not know how it is in the current version

if necessary put a bed for the two villagers and throw in food, then a child comes

So can I no longer use it?

No, he has already traded with them, then it is no longer possible

If you can't use it with your current job, no.

Lol, in Skyblock 1.14.4 it worked for me.