Hi everyone,
This bug happens on migration from CE 5.2.0.7 to 5.5.0.3.
Migration was stopped after that warning.
A quick search gives the following article for this error: Solution - Migration stalls with `record too small`
My bad, I always using duckduckgo to search and it showing nothing relate in result 
No need to apologize. It seems duckduckgo doesn’t show much result from this forum at all… but on Google it was the top search. But, in general, I suggest directly searching on this forum itself 
Thank you @meher