Got weird error on deployProxy after changing nothing

Support Upgrades
1

I had been testing out upgradeable contracts when I got this error in migrations when using deployProxy after changing absolutely nothing:

SyntaxError: Unexpected end of JSON input
    at JSON.parse (<anonymous>)
2

I was digging around through the internet and found someone that suggested deleting .openzeppelin/<network>.json, and this did the trick.

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