I upgraded a site from EE 1.7.3 to EE 2.9.1 - the last piece was upgrading Playa. The site was working fine until that point. When I went to upgrade Playa, I received the following error:
Error Number: 1060 Duplicate column name 'parent_element_id' ALTER TABLE exp_playa_relationships ADD parent_element_id VARCHAR(255) NULL AFTER parent_var_id Filename: third_party/playa/ft.playa.php Line Number: 488
After checking for parent_var_id and parent_is_draft (both exist) I went to set the version number to 4.5 in exp_fieldtypes - however there is no playa field listed in that table.
Also, now the site and control panel do not load and instead I'm getting:
Site Error: Unable to Load Site Preferences; Invalid Preference Data
Thanks for any help you can provide.