C# SQL Error The SqlParameter is already contained by another SqlParameterCollection

Question

I have developed a simple Windows application. To reuse code I have created a separate class file for database management named as DM.

All is working fine except I am getting this error which is not being solved.

The error looks similar to the link The SqlParameter is already contained by another SqlParameterCollection - Does using() {} cheat?

but the solution is not working for me.

My code:

SqlParameter[] SQL_Params =
        {
            new SqlParameter("@app_srno", textBox1.Text.Trim()),
            new SqlParameter("@resetBy", username_Form)
        };

queryString = "insert into Record_Reset (app_srno, resetBy) values(@app_srno, @resetBy)";
DM.execute_query(queryString, SQL_Params);

// sqlParams = null;

queryString = "update [KYC_Index] set [transform_int] = 'N',[transform_int_by] = null,[transform_pic] = '',[transform_poi] = '',[transform_poa] = '',[transform_by]=null,[qc_int]='N',[qc_int_by]=null,[qc]='N',[qc_by]=null where [srno] = @app_srno";

DM.execute_query(queryString, SQL_Params);  // error happens here 

The code in my class file DM

public void execute_query(string query, SqlParameter[] sqlparams = null)
{
    using (SqlConnection connection = new SqlConnection(connectString))
    {
        using (SqlCommand sqlcmd = new SqlCommand(query))
        {
            sqlcmd.Connection = connection;

            if (sqlparams == null)
            {
                sqlcmd.CommandType = CommandType.Text;
            }
            else
            {
                sqlcmd.CommandType = CommandType.StoredProcedure;

                foreach (SqlParameter p in sqlparams)
                {
                    sqlcmd.Parameters.Add(p);
                }
            }

            try
            {
                connection.Open();
                sqlcmd.ExecuteNonQuery();
                sqlparams = null;
                sqlcmd.Parameters.Clear();
                connection.Close();
            }
            catch (Exception)
            {
                //MessageBox.Show(ex.Message);
            }
        }
    }
}