Problem:Data truncated for column 'Modified_Date' at row1

DROP PROCEDURE IF EXISTS hms.UpdateCarePlan1;

CREATE PROCEDURE hms.`UpdateCarePlan1`(_Target_value             int,
                                       _Current_Test_Date        Date,
                                       _Test_Result              varchar(50),
                                       _Measurement_Frequency    varchar(50),
                                       _Next_Due_Date            Date,
                                       _Patient_Id               int,
                                       _ParameterId              int,
                                       _Modified_Date            datetime,_date datetime)
   BEGIN
      UPDATE    patient_progress_tracking_details c
             INNER JOIN
                patient_progress_tracking_header b
             ON b.Id = c.Id
         SET c.Target_Value = _Target_value,
             c.Measurement_Frequency = _Measurement_Frequency,
             c.Test_Result = _Test_Result,
             c.Current_Test_Date = _Current_Test_Date,
             c.Next_Due_Date = _Next_Due_Date,
             c.Modified_Date = _Modified_Date,
             b.Modified_Date=_date
       WHERE c.Patient_Id = _Patient_Id AND c.ParameterId = _ParameterId;
   END;

protected void grdcareplan_RowUpdating(object sender, GridViewUpdateEventArgs e)
        {
         string ParameterId = Convert.ToString(grdcareplan.DataKeys[e.RowIndex].Value);
         TextBox txttargetvalue = (TextBox)grdcareplan.Rows[e.RowIndex].FindControl("txttargetvalue");
         TextBox txttestdate = (TextBox)grdcareplan.Rows[e.RowIndex].FindControl("txttestdate");
            TextBox txttestresult = (TextBox)grdcareplan.Rows[e.RowIndex].FindControl("txttestresult");
            DropDownList ddlMeasurementFrequency = (DropDownList)grdcareplan.Rows[e.RowIndex].FindControl("ddlMeasurementFrequency");
            TextBox txtnextduedate = (TextBox)grdcareplan.Rows[e.RowIndex].FindControl("txtnextduedate");
            TextBox txtremarks = (TextBox)grdcareplan.Rows[e.RowIndex].FindControl("txtremarks");
            DateTime testdt = DateTime.ParseExact(txttestdate.Text, "yy/dd/MM", null);
            DateTime nextdate = DateTime.ParseExact(txtnextduedate.Text, "yy/dd/MM", null);
            MySqlConnection strConnection = null;
             MySqlCommand strCommand = null;
            try
            {
                strConnection = new MySqlConnection();
                strConnection.ConnectionString = StrConn;
                strConnection.Open();
                strCommand = new MySqlCommand();
                strCommand.Connection = strConnection;
                strCommand.CommandType = CommandType.StoredProcedure;
                strCommand.CommandText = "UpdateCarePlan1";
                strCommand.Parameters.AddWithValue("_Target_value", txttargetvalue.Text.ToString());
                strCommand.Parameters.AddWithValue("_Current_Test_Date", testdt);
                strCommand.Parameters.AddWithValue("_Test_Result", txttestresult.Text.ToString());
                strCommand.Parameters.AddWithValue("_Measurement_Frequency", ddlMeasurementFrequency.SelectedItem.Text.ToString());
                strCommand.Parameters.AddWithValue("_DiseaseId", ddlselectdisease.SelectedValue);
                strCommand.Parameters.AddWithValue("_Next_Due_Date", nextdate);
      strCommand.Parameters.AddWithValue("_ParameterId", ParameterId);
                strCommand.Parameters.AddWithValue("_Patient_Id", Convert.ToInt32(Session["DiagnosisClickId"]));
                strCommand.Parameters.AddWithValue("_Modified_Date", DateTime.Now);
                strCommand.Parameters.AddWithValue("_date", DateTime.Now);
                strCommand.ExecuteNonQuery();
                grdcareplan.EditIndex = -1;
                 BindCarePlan();
                ModalPopupExtender1.Show();
                Biomade.Visible = true;
            }