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Juan Salas 8Juan Salas 8 

Trailhead error while completing challenge Manage your picklist values Module

Hi, I am working on trailhead called Picklist Administration https://trailhead.salesforce.com/en/modules/picklist_admin/units/picklist_admin_manage and I am getting the following error while trying to create a formula field:       

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: MLHXOLBN

Challenge description:
Use the formula editor to set the Default Value for the Macaron Flavor picklist as follows:CASE(MONTH(TODAY()),1, "Gingerbread",2, "Strawberry",4, "Chocolate",7, "Raspberry",11, "Pumpkin",12, "Mint", "Vanilla")


Any ideas what could cause the issue?
Amit Chaudhary 8Amit Chaudhary 8
Please check below post. I hope that will help you
1) https://developer.salesforce.com/forums/?id=9060G0000005NRfQAM

NOTE:- Look like issue is coming due to some other changes in your org. Try to create same formula on different Playgroud
Juan Salas 8Juan Salas 8
Hi Amit, thnaks for the suggested, I keep getting the same issue on other 2 playgrounds https://developer.salesforce.com/forums/?id=9060G0000005NRfQAM