YOU SAID:
I forgot how to not know how to walk!
INTO JAPANESE
歩き方がわからないのを忘れました!
BACK INTO ENGLISH
I forgot that I do not know how to walk!
INTO JAPANESE
私は歩く方法がわからないことを忘れました!
BACK INTO ENGLISH
I forgot that I do not know how to walk!
That didn't even make that much sense in English.