go to post Everardo Cunha · Jul 18, 2019 Global keys are always unique! I think you are confused because in a traditional sql environment you can only insert a row using a key and value pair once. After that, to change the value you do an update!In cache, there is no distinction between setting a global node the first, the second or the third time.insert into student(studentid, name) values(1, 'john')to change this, you must do an update:update student set name = 'john smith' where studentid = 1in cache, you can simply do this:set ^student(1)="john"and then do:set ^student(1)="john smith"There is no obvious distinction between n insert and an update!