db-schema/db_scripts/diff/15074.up

USE provisioning;

-- not in use anymore
DELETE FROM voip_pbx_groups;

-- rework to be a mapping table instead
ALTER TABLE voip_pbx_groups
  DROP COLUMN contract_id,
  DROP COLUMN name,
  DROP COLUMN extension,
  DROP COLUMN hunt_policy,
  DROP COLUMN hunt_policy_timeout,
  ADD COLUMN group_id INT(11) UNSIGNED NOT NULL,
  ADD KEY group_idx(group_id);