Whose Minhag is it ?

R. Y. M. Tukaczhinsky zt"l (Sefer Eretz Yisroel 18-3) writes “ the
Sefardim & Chasidim celebrate Lag Baomer and light fires.”

Seems,  non Chasidic Ashkenazim have no such Minhag .(in E.Y.)

The Minchas Elozor 4-60 (Chasidic Rebbe) writes “ Lag Baomer
celebrations (music & dancing etc.) are only for Bnei  Eretz Yisroel.
In Chutz La'aretz these celebrations are strange and haughty .
כזרות יחשב וכיוהרא  “

 Seems, in Chutz La'aretz even Chasidim have no Minhag of
celebrating Lag Baomer.
Not to deviate from your  Minhagim & Mesorah, means
you don't search for & follow new Minhagim, your
parents/ grandparents  haven't heard of or done so.