Hey, do letters of recommendation have an "expiration date" when they are no longer considered relevant? And more to the point — should I ask my recommenders to submit LORs again given the fact that they wrote them for me for the current cycle (20-21) but due to some unpredictable circumstances I had to postpone my admissions for the next cycle? I've read that LORs should be relevant to your current experience but I'm 2 years out of school and my job is the same as it was last year.

Thank you in advance!