If you see the "This value doesn't match the data validation restrictions defined for this cell" error in Excel, this article will help you.

How to base a data validation dropdown on an array in Excel Now we’re ready to create the data validation dropdown that will display the unique list in column H.

Go to the ‘ Data ’ tab located on the Ribbon menu. Under the ‘ Data Tools ’ select ‘ Data Validation ’ option. When the Data Validation window opens, you’ll see several controls.