Database errot

Hi Guys

I have a multi site. I want to change the multi site to the main one (ie: ournutriearth/govegan to be the ournutriearth.co.za)

I changed the the names around by putting ournutriearth.co.za to ournutriearth.co.za/tester and ournutriearth.co.za/govegan to ournutriearth.co.za. Then changed the config file ( I got this info online)

The multi sites are working but the main site isnt. Its getting error and wont let me into the multisite dashboard

What did I do wrong?

Please help

Thanks