後退 こうたい回復 かいふくじゃなかったです
kōtaikaifukujanakattadesu

Noun
Desu Copula

The polite, past negative form of 後退回復

1. Wasn't a retreat/backtracking.; Didn't revert/backtrack.

Past/Perfective
Negative
Polite
Casual Register
Computing