How to reset identity seed after deleting records in SQL Server

Regex- Number at the end is throwing validation error

Chatto

I have the regex as below. If number 1 is somewhere in the middle of the string, it is not throwing an error. But if the number is at the end, it is throwing validation error

NUÑEZ1 - error

NU1ÑEZ - working fine

nameValidator = /^[w'-,.()~`!#$%^{}s][^|":<>[]“/;@=+?[]]*$/;