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How to update a Record Type to Master?


I have created an Account Record Type say 'Exhibit'. I assigned it to System Admin profile and created few Accounts using 'Exhibit' record type.

Now I want assign default Master record type to those Accounts. I modified System Admin profile to use Master record type as default for Accounts. I'm trying to update the Account Record Type from Exhibit to Master by code / data loader, but I'm not able to do that.

For Master record type, record type Id will be null right? But when I'm assigning null by code and updating Accounts, record type is not getting updated to Master. How can I do this by data loader?

Can anyone please help me on this?

Unfortunately you cannot revert back the record type to master if the object has custom record types
I am afraid you won't be able to update the RecordType to Master.As per salesforce docs :-

'Record types that are checked in this column are available when users with this profile create records for the object. If --Master-- is selected, you can't select any custom record types; and if any custom record types are selected, you can't select --Master--.'

Link to doc :-

What is the use case here,why do you need to change the RecordType back to Master.
Pavan Kumar KajaPavan Kumar Kaja
Its Not possible. check below link (
So Eclipse or ANT Migration to the rescue. What I did this is this - 
Simply export the Recordtype and Profile. Locally change the XML to remove visibility and default-ness. Save to Server or deploy to Destination!

        <default>false</default> <!-- This was true when I downloaded - change to false>
        <visible>false</visible> <!-- This was true when I downloaded - change to false>
Phaneeswari RamineniPhaneeswari Ramineni
Hi Shruthii,
It is possible to change record type from custom to master. Kindly follow below steps.
  • From Setup, enter profiles in the quick find box, select Profiles.
  • In profiles, select System administrator profile.
  • Drag down then you will find Record Type Setting section.
  • In that you can see Accounts with edit option.
  • Click Edit.First Remove your custom record types from the Selected record types .
  • Next,Click on --Master-- and click Add.
  • Finally Click on Save. That's it your record type changed to Master now.