Failing hard drive

[Illya]

Hello.
I have a Qnap nas with 8 hard drives in a raid 5 array. One of my hard drives has been detected as faulty and so I am hoping to swap it out.
I remember when I set this raid array up I read that I would need exactly the same drives or it wouldn’t work.
I have 8 x wdc wd40efrx-68n32n082.0 4Tbyte
Question: To swap out the drive, does the whole serial number need to be identical (including the -68n32n082.0 part)? Is there any latitude in the exactness of the drives?

Note: I set this up a few years back now and am not someone who visits this often. Only now that a drive needs replacing am I revisiting this. Therefore I’m pretty much a novice.
Any help will be greatly appreciated.

[dolbyman]

no such requirement exists

hotswap the faulty drive with any nas rated drive of equal or larger size