Problem with dax measure and relation ship

Hello, I have a problem with some tables and I don't know how to solve it, the tables are

• A main GLS table containing all accounts and the department they belong to
• The DaxCalendar table by month
• The department table containing the department
• Two tables with the values ​​of the real amount, one (TReal) and the theoretical amount in the other (TPlan),
• And a table containing the department, account, month and comment (GLxDepartxMonth)

The relationship is direct between GLS, DaxCalendar, TReal, TPlan and department
GLxDepartxMonth has a relationship with GLS, DaxCalendar but it is not the main relationship with department

The problem is that, when I show the account, the real and theoretical amount per month and selected department and I put the justification, it is duplicated for each department.
This dax does not work for me, what can I do to request it?

Just1 =

CALCULATE(

    FIRSTNONBLANK(GLxDepartxMonth[Justificacion],BLANK()),

    GLxDepartxMonth[Departamento.Temp] = SELECTEDVALUE(Department[Departamento]) &&

    GLxDepartxMonth[MesTxt] = SELECTEDVALUE('DAX Calendar'[MesTexto]) &&

    GLxDepartxMonth[GL] = SELECTEDVALUE(AllGL[GL])

 

Thanks for the help