my procedure is, active debug mode, go to settings, technical and FIELDS.

Field Name;Field Label;Model;Field Type;Indexed;Stored;Readonly;Related Model

x_Contract_Type;Contract Type;Maintenance Equipment;text;FALSCH;WAHR;FALSCH;

x_Create_date;Create Date;Maintenance Equipment;date;FALSCH;WAHR;FALSCH;

x_Current_Master_Software;Current Master Software;Maintenance Equipment;text;FALSCH;WAHR;FALSCH;

x_Customer_ID;Customer ID;Maintenance Equipment;integer;FALSCH;WAHR;FALSCH;

x_Debit_No;Debit No;Maintenance Equipment;integer;FALSCH;WAHR;FALSCH;

There are fields from Odoo 15 that I need in Odoo 18.

I get the following error message

The file contains blocking errors (see below)

Missing required value for the field 'Model' (model_id) at multiple rows 

thanks for you Help