Hi Zillvr,
I tried the Option 1 to delete the specific corrupted session data that you pointed out and it worked great. I did not have to reselect character, the data was rolled back a little bit but still within the same day so it is no big deal, I did not lose many stuffs.
So thank you very much for your enthusiasm and the time you invested in investigating the problem and giving 3 options for me to choose from, I really appreciate all those efforts !
Could you tell me how to figure out the corrupted session data (for example, the 0000000169 file above) ? So that I might fix the server if it ever gets crashed again.