Hi Everyone, I got Stuck in the same challenge.
In Process Automation,
Automate Basic Business Processes with Process Builder
 
Create a process to update child record when the parent is updated.
You've been given a requirement to keep Contact addresses in sync with the Account they belong to. Use Process Builder to create a new process that updates all child Contact addresses when the address of the Account record is updated. This process:
Can have any name.
Must be activated.
Must update Contact mailing address fields (Street, City, State, Post Code, Country) when the parent Account shipping address field values are updated.
NOTE: You may have to deactivate the validation rule for the Contacts object (created from a previous challenge) in order to complete this challenge.


Again It shows an error.

Challenge Not yet complete... here's what's wrong: 
There was an unexpected error in your org which is preventing this assessment check from completing: System.DmlException: Insert failed. First exception on row 0; first error: FIELD_CUSTOM_VALIDATION_EXCEPTION, Account number must be 8 characters long.: []

Can you please tell me how to deactivate the validation rule in contacts.

Hi Everyone, I got Stuck in the same challenge.
In Process Automation,
Automate Basic Business Processes with Process Builder
 
Create a process to update child record when the parent is updated.
You've been given a requirement to keep Contact addresses in sync with the Account they belong to. Use Process Builder to create a new process that updates all child Contact addresses when the address of the Account record is updated. This process:
Can have any name.
Must be activated.
Must update Contact mailing address fields (Street, City, State, Post Code, Country) when the parent Account shipping address field values are updated.
NOTE: You may have to deactivate the validation rule for the Contacts object (created from a previous challenge) in order to complete this challenge.


Again It shows an error.

Challenge Not yet complete... here's what's wrong: 
There was an unexpected error in your org which is preventing this assessment check from completing: System.DmlException: Insert failed. First exception on row 0; first error: FIELD_CUSTOM_VALIDATION_EXCEPTION, Account number must be 8 characters long.: []

Can you please tell me how to deactivate the validation rule in contacts.

Hello,
I am not able to complete following challange.

Developer Beginner -> Process Automation->Automate Basic Business Processes with Process Builder


Tried all variations like "Updated records meet all conditions" and "No criteria—just update the records!". 
"Conditions are met" and "No criteria—just execute the actions!"

Please help

I followed each step under "Hunt Your Prospect", but when I try to complete step #6, I get this message:

System.DmlException: Insert failed. First exception on row 0; first error: REQUIRED_FIELD_MISSING, Required fields are missing: [Discount_Percent__c]: [Discount_Percent__c] (System Code)

How do I fix this?