Cannot enable manufacturing domain, due to Invalid Option

ERPNext
1

I get an error when I try to enable the Manufacturing domain:
Option Item for field alternatives_list is not a child table
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Item Alternative Doc:

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image1456×538 41.7 KB

2

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image1546×474 61.7 KB

Item Doctype

3

I couldn’t find the default DocTypes anywhere, therefore created a frappe cloud instance, took a peek, saw that Alternatives List is not a default field in DocType Item.

Removed it, and Domain was enabled.