Just wanted to add my two cents, after one whole morning wasted trying to solve my problem with no success...
Running ZenCart v1.3.9
Followed instructions as given, carefully.
I was always getting the following message:
12 statements processed
Error: Impossible to add configuration_key "" as already existand (or similar meaning message, I'm Italian)
Note: 1 statements ignored. See "upgrade_exceptions" table for additional details.
Well, the upgrade_exceptions table was empty, and I was only able to find the scart table, correctly created, but I was not able to find ANY of the RCS entry in zencart_configuration table.
I tried to apply the SQL patch using the Admin side, but the message was always the same.
I tried doing this UPLOADING the patch, but this not even worked (it was indeed my first time...)
I tried doing this from myPHPAdmin and obviously there were many references missing...
So, after a DB clearing of the wrongly created tables (the ones created from myPHPAdmin for example...), I decided to run the "DO IT BY HAND" way...
Well, I know this could be very dangerous, but I know how SQL behaves and I know how to enter some data...
I took my risks.
I then entered the first zencart_configuration table value and I succeeded, so I went on with the second... and the third (I know, I had to enter also the value for zencart_configuration_group, but I looked for the right value before starting...).
After the third value, I was already tired (you know: computers should help, not complicate our lives...).
So I edited the original SQL patch to remove the already entered values, to reflect the values which were created by the script (see above) and decided to try to complete this phase within myPHPAdmin...
I succeeded and I was finally able to find all the configuration values within the Configuration menu, to edit them and to finally find my abandoned carts...
I guess that the instruction to create the configuration table is somewhat too long and this could be a problem.
My suggestion is to split it into two shorter instructions to avoid any problems to other, similar to the one I personally suffered.
Hope having given some useful hints to you all.
Best regards.
mickymix