If a cell already have a value, trying to remove it and leave it blank catches an error
at Triggernometry.Forms.VariableEditorForm.dgvVariableData_CellValuePushed(Object sender, DataGridViewCellValueEventArgs e)
at System.Windows.Forms.DataGridView.OnCellValuePushed(DataGridViewCellValueEventArgs e)
at System.Windows.Forms.DataGridViewCell.SetValue(Int32 rowIndex, Object value)
at System.Windows.Forms.DataGridView.PushFormattedValue(DataGridViewCell& dataGridViewCurrentCell, Object formattedValue, Exception& exception)
at System.Windows.Forms.DataGridView.CommitEdit(DataGridViewCell& dataGridViewCurrentCell, DataGridViewDataErrorContexts context, DataGridViewValidateCellInternal validateCell, Boolean fireCellLeave, Boolean fireCellEnter, Boolean fireRowLeave, Boolean fireRowEnter, Boolean fireLeave)
at System.Windows.Forms.DataGridView.CommitEdit(DataGridViewDataErrorContexts context, Boolean forCurrentCellChange, Boolean forCurrentRowChange)
at System.Windows.Forms.DataGridView.OnCellMouseDown(HitTestInfo hti, Boolean isShiftDown, Boolean isControlDown)
at System.Windows.Forms.DataGridView.OnCellMouseDown(DataGridViewCellMouseEventArgs e)
at System.Windows.Forms.DataGridView.OnMouseDown(MouseEventArgs e)
at System.Windows.Forms.Control.WmMouseDown(Message& m, MouseButtons button, Int32 clicks)
at System.Windows.Forms.Control.WndProc(Message& m)
at System.Windows.Forms.DataGridView.WndProc(Message& m)
at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
Triggernometry.Forms.VariableEditorForm, TriggernometryPlugin, Version=1.1.3.2, Culture=neutral, PublicKeyToken=null```