1.1.21 to 2.0.15 "one auto column" error

[gccb]

Hi, my small forum has some upgrade issue..

1. only the stock theme is installed.

http://goldcoastcb.com/images/smf_error_0.jpg [nofollow]
2. Version info looks good

http://goldcoastcb.com/images/smf_error_1.jpg [nofollow]
3. Only packages are updates


http://goldcoastcb.com/images/smf_error_2.jpg [nofollow]
4. Version check is OK

http://goldcoastcb.com/images/smf_error_3.jpg [nofollow]
5. But I keep getting stuck at this "Changing column names" error while upgrading.


Please help. 
Thank you.
Rodney.

[Sir Osis of Liver]

Which php version are you running?  Are you in mysql or mariadb?

[gccb]

Hi, sorry for the delay. (on funny hours in Australia)

PHP 5.6 (I have Wordpress site on the same host I need to keep happy)

That should be OK?

mysql I presume. How do I tell?

X10 free host's PHP will switch between 5.4 to 7.1

My SMF site's been weird (attachment and gallery troubles) after going PHP 5.4,
thus why I'm upgrading.

Thanks
Rodney