Need Formula for blank out duplicate cells based on value that is changes in another colum

Hello

I'm looking for a formula that would blank out cells in Column B and not delete the entire row when duplicate data is found but the trick is that it needs to be based on when there is duplicate data in column A then it should just keep one value in column B and all other values related to that other column should be blank.

Column A Column B
ABC 123
ABC 123
ABC 123
DEF 456
DEF 456
DEF 456

So my result should be like this

Column A Column B
ABC 123
ABC
ABC

Thank you.