[ASM] : SQL-INJ "end-quote UNION" - How to allow this signature to specific url/uri/parameter only

You got this because the world UNION detected between quotes

Union is an SQL command so it match the signature

If you click the Accept button an exception will be automatically be created for the specific parameter.

Else you can manually create one under Security → Application Security → Parameters select you policy and create a parameter
Therre you can define the parameter name, the url and the attack signature you want to exclude.