Any way to add multiple archetypes and avoid validation errors?

[magpi]

Hey all, when I GM Starfinder, I like to give my groups story rewards in the form of extra archetypes (ie, they completed some Stewards mission so they got a Steward archetype, et cetera). While this is obviously not within in the ruleset and honestly is probably op, my players seem to like the mechanic. I know I can add many archetypes just fine, but has anyone found a way to remove the validation error through any existing adjustments? I tried both no max limit and ignore prereqs adjustments.