Hello Christoph,
ESTRH does have two fields which are "significant", RECN and ACTN; as they are different there is no issue. The "Issue" is: the RECn and RECNROOT of both sepcs [records?] is the same; never seen that.
IMHO this is correct:
For DB Table ESTRH or RECN and RECNROOT are always the same (For all other EHS table the have to be different).
This does not change when you create "records splits" / use change numbers.
But maybe I misinterpret what you mean:
I'm not quite sure waht you mean by "both sepcs" - for me the two records are for the same Specification / SUBID = 200*10886.
Regards
Mark