cannot import keywords table back into chrome (Web Data)

i’m trying to backup the search engine parameters in my Chrome. from other posts, I’ve seen I can export the keywords table (to a .csv file) from the Web Data file and then re-import the .csv file into the keywords table, but when I do that, the table is successfully imported but the moment I open Chrome it resets and wipes out all search engine data.

is there something i’m missing?