In Connection.php line 829:

SQLSTATE[42000]: Syntax error or access violation: 1091 Can't DROP FOREIGN KEY lead_pipeline_stages_lead_stage_id_foreign; check that it
exists (Connection: mysql, SQL: alter table lead_pipeline_stages drop foreign key lead_pipeline_stages_lead_stage_id_foreign)

In Connection.php line 587:

SQLSTATE[42000]: Syntax error or access violation: 1091 Can't DROP FOREIGN KEY lead_pipeline_stages_lead_stage_id_foreign; check that it
exists

The foreign key's absolutely exist in the database, I believe this to be a bug.