clear column based on enum type selection

[infinitiapps]

Hello there, I have a column ref type that should reset if anything else is selected in another column that is enum type:

When "Personal" is selected, the client ref type column shows up and you can select the client. However, if you select "Dealer", the Dealer ref column shows up and if you go back to "Personal", the client ref column should be clear. 

I tried using in the valid if section something like:

If([operacion]<> "personal", "", true)

or

If([operacion]<> "personal", "", [client])

 However, I get and invalid error:

[Marc_Dillon]

https://help.appsheet.com/en/articles/2357288-or

https://help.appsheet.com/en/articles/2355961-ifs

[infinitiapps · Accepted solution]

in the valid if section: 

If ("personal" <> [type], list(), select(client[id], true, false))