SQL Server Table Column Column is not supported. Object type

I have to ask this because it worries me and I cannot find the specific source of this problem. I know how to use TVP (Table Parameter) in Sql Server and I am using it for batch inserts in my stored procedure. So basically I create table types in Sql with corresponding columns / fields for the table I am going to insert records into and it works fine for me from code (C #) to sql stored procedure, now here is my problem: recently when users try inserting multiple records, there are certain random fields in the table parameter that give such an error message when trying to execute a stored procedure (mostly in C # because it throws some error).

Column type {field} 'is not supported. Object type

In each case, the field in the error message changes, so I know the problem is in the data, but I don't know what it is. By the way, I am passing data from my source to a datatable to be used as a parameter for the insert:

dr["{field_name}"] = {value}

      

        
        
        
      

    

Update: I want to go into more detail on how to wrap values ​​into data. Basically, I will try to loop through all rows in the datatable through

table.Rows.Cast<DataRow>().ToList().ForEach( action => {statements})

      

        
        
        
      

    

then inside foreach I assign

action["{field_name}"] = action["{field_name}"].{formatting_function}

      

        
        
        
      

    

I need this to format the data before inserting it into the database for example. to convert to uppercase or lowercase, or to convert to specific types, for example. for boolean.