Help with a LOOKUPVALUE

Hello, sorry to bother you and thank you for taking the time to read my problem.
Also excuse my English, I am using DeepL Translator.

Well let's start. Today I was asked to use LOOKUPVALUE to search for a specific data, but if it doesn't find a data, search with another formula. For this I use the following data.

LeadsV2

SuuborigeneMailDate

modelov2

SuborigenWelcome GUID

TodoIntranet

lead_pilotcliente_mailOrigen Lead

In my attempt to do so, I logged in to get data from the table modelov2, and this is the code and the result

Origen Lead = 
var __suborigen = 
    LOOKUPVALUE( modelov2[Welcome GUID],
                'modelov2'[Suborigen],
                'TodoIntranet'[lead_pilot])

var __email = 
    LOOKUPVALUE('LeadsV2'[Suuborigen],
                'LeadsV2'[eMail],
                'TodoIntranet'[cliente_mail])


return __suborigen

The idea is that when the variable __suborigin is blank, it searches in the variable __email, but every time I try to test the variable __email I get the error that it has more than one data.

I understand the error, I checked in the LeadsV2 table and the data is repeated, but with different date, is there any way to take the first time, that is, the oldest date of the record.

As you can see there are 3 records with the same email, but I need the oldest one.
It should be noted that there are times when the difference is of hours, that is, they are the same day but one was made before the other.

Any kind of help would be important to me.

Thank you for everything.

Ivancito