#DevTools: Howto find conflicting yaml causing JS errors

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earnest remnant
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I have a very big yaml file (about 4000 files) to manage my lovelace dashboard. On occasional refreshes (about 30-40% of the time), one item doesn't load and gives the Chrome Developer Tools show me a javascript error caused by custom:button-card.

I use about 80 around these in my design and I want to find the conflicting one using Chrome instead of going by them manually. This is what Chrome shows me (see attachment).

I want to see where it conflicts in my configuration instead of seeing the Javascript error. Is there any way to do so?