Shely integration is not there

Hil folks,

when I try to integrate a new Shelly device, the integration module says, that it’s allready there.
I find the device in the device list, but all entities are deactivated an I can’t activate them.
I think, that I had this Shelly-device allready installed and replaced with another one.
Now there is a name-collision (I think)

Is it possible to delete integrations manually?
I’m confused

Yes.
image

Unfortunately it isn’t listed in the integration-list.
I only find it in the devices-list

Can you delete the associated entities from the Configuration / Entities list?

If so, do that then restart Home Assistant.

Then try adding the device again.

I found the problem.
The integration was inactive and hidden.