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François COMBEAU 1François COMBEAU 1 

Process Automation Specialist - Step 2 - Field Names

Hello All,

Working on Process Automation Specialist - Step 2, I'm unable to create Field Names expected by Trailhead :
On Account Object, I try to creat a Roll-Up Summary field with Field Name = "Number_of_won_deals__c" as expected by Trailhead and I get the message :"Error: The custom field name you provided Number_of_won_deals__c on object Account can only contain alphanumeric characters, must begin with a letter, cannot end with an underscore or contain two consecutive underscore characters, and must be unique across all Account fields.

Any Idea to solve this problem ?

Trailhead RequirementsSalesforce Error Message
Best Answer chosen by François COMBEAU 1
François COMBEAU 1François COMBEAU 1
For those who might find the same problem, I eventually found my mistake :
When you create a Field, Salesforce populate automatically the Field Name. Don't anything to this Field Name : Salesforce will add by itself the "__c" suffix.