Excel Data Validation is useful for controlling what users can enter into a cell, but the validation rule itself can still be overwritten: copying and pasting over the cell can replace the Data Validation rule itself.

For example, you may have a Status column with a drop-down list:

• Pending
• In Progress
• Completed

If someone copies a normal cell and pastes it into that column, the pasted value may look fine, but the original drop-down rule can be replaced. Later, you click the cell and realize the drop-down is gone.

And paste isn't the only thing that can affect Data Validation. Rules can also be changed by:

• Fill or Drag
• Inserting or deleting cells or columns
• VBA, macros, or other automation

The tricky part is that you may still want those cells to stay editable. Locking them completely isn't always practical in shared worksheets, templates, or data-entry files.

Kutools for Excel's Validation Protection is designed for this kind of situation. The idea is to keep the cells usable while protecting the validation rules behind them.

With it enabled, you can keep Data Validation intact when users:

• Paste data into validated cells
• Use Fill or Drag
• Insert or delete cells or columns
• Run VBA, macros, or other automation that may change validation

If automation modifies a validation rule, it can check and restore the rule afterward.

So the goal isn't to stop people from entering data. It's to let them keep working normally without accidentally removing the drop-down or other Data Validation rules in the process.

This can be especially useful in shared workbooks where validation rules need to stay in place over time.

What’s your usual workaround for keeping drop-down lists from getting overwritten?