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sharan swaroop Bikkumandlasharan swaroop Bikkumandla 

JEJCQRRI

Hey I was getting this error when I was doing a trailhead module, can someone help?

Challenge Not yet complete... here's what's wrong: 
There was an unexpected error while verifying this challenge. Usually this is due to some pre-existing configuration or code in the challenge Org. We recommend using a new Developer Edition (DE) to check this challenge. If you're using a new DE and seeing this error, please post to the developer forums and reference error id: RWEZCUFH

Thanks,
Dev_AryaDev_Arya
Hi Sharan,

This happens quite often, when people have done some development in their DEV org for some practice purpose and while following the trailheads, that earlier work becomes some kinda hurdle. If you have messed up with your dev org a lot, it is recommended better to use  a trailhead playground or use a fresh DEV org.

If you still face the error, please mail to trailhead.
Please mark the question as green if this helps you. 
Cheers, Dev