methodology_id and tag_id should be represented as primary keys in the methodology_to_tags table

[AyinawuT]

For the methodology_to_tags table, the many-to-many relationship between the methodologies and tags tables is being resolved by this table. The methodology_id and tag_id should be represented as primary keys in that associative table to form a composite key.

[evanp]

I don't remember what the tag means here.