I've just upgraded to EE 2.9 and trying to update Playa to 4.5.
When I go to Fieldtypes -> Playa I get this error:
A Database Error Occurred 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
Line Number: 488
The previous version I had installed was 4.4.5 - I've tried setting it to 4.4.4 in exp_fieldtypes as well but same error.