Cell won't return to blank when values are deleted

So I have this issue where even though the formula instructs the cell to blank, however when after I delete the probability and impact numbers the cell in the Severity field will not return to blank but reverts to Low.

Description of the formula:

- Blank if probability or impact level is empty.

- "Low" if the product is less than 8.

- "Medium" if the product is less than 15.

- "Serious" if the product is less than 20.

- "Critical" if none of the above conditions are met.

=IF(OR([Current Probability]@row = " ", [Current Impact Level]@row = " "), " ", IF([Current Probability]@row * [Current Impact Level]@row < 8, "Low", IF([Current Probability]@row * [Current Impact Level]@row < 15, "Medium", IF([Current Probability]@row * [Current Impact Level]@row < 20, "Serious", "Critical"))))

Do I need to add something?

Answers

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