Double buildings/hirelings/items when adding them to stronghold sheet

Describe the bug

(From https://github.com/aMediocreDad/fbl-content-modules/issues/21 by @Ezekiel-2703)

Hi.

I wanted to report an issue in the FL module of Foundry VTT. When creating a stronghold from the actor tab, adding any building, hireling or items to the stronghold sheet will cause two items to be created. This in itself would not be a big issue but each double item cannot be removed: the error "undefined id [numbers here ]is not in the set of invalid ids" is reported when you try to remove the double buildings/hirelings/items in the stronhold.

Is there a workaround for this while this is being worked at? Currently the stronghold functionality is now unuseable in Foundry VTT for FL.

Kind regards,

Ezekiel

bug Stronghold

bug Stronghold2

Reproduction

See above.

System Info

NA

Logs

No response

Validations

[X] Done a clean install of the system.
[X] Disabled all modules.
[X] Checked if the issue is present in a new world instance (create a new world in foundry using the Forbidden Lands system).
[X] Not a bug report about the content modules. Reports regarding the content modules go here instead.
[X] Not a "How To"-question (You can ask questions here: Discussions).

fvtt-fria-ligan / forbidden-lands-foundry-vtt