Monetization can be disabled for several reasons. Also, here's our Help Center article which has more info on why monetization can be disabled on a channel: https://goo.gl/aVpvuW . Hope this helps clarify.
@TeamYouTube Why my channel's monatisation section is disable?
I had other adsense account that i had cancelled. But on this not have strike, i do not use other content then why my monatisation is disable?
pic.twitter.com/cMDfwrnHC2
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