What Skipper version are you using?
What MN relation are you using? Common or polymorph?
In case that common MN, it's correct that the table is named
accomodation_facility in the singular form. This is how Laravel works.
In case that Skipper somewhere exports it in plural form, it's a bug. But to be able to fix it, we would need a demo project with this error.
Please send your complete project (or only the fragment with this issue) to my email [email protected] and we will check it tomorrow.