Operation failed: Update Indices

After upgrading from 4.7.16 to 4.7.28, I got an error on the System Status page when clicking on "Update Indices" (/civicrm/a/#/status), see file(s) attached:

 
"Operation failed: Update IndicesDB Error: unknown error*Debug information:*
DROP INDEX UI_case_contact_id ON civicrm_case_contact [nativecode=1553 ** Cannot drop index 'UI_case_contact_id': needed in a foreign key constraint]"
 
When I update the indices via mysql it works:
 
USE db_civicrm;
SHOW CREATE TABLE civicrm_contact;
SET foreign_key_checks = 0;
SHOW INDEX FROM civicrm_contact;
DROP INDEX `index_is_deceased` on civicrm_contact;
CREATE INDEX `index_is_deceased` on civicrm_contact (is_deceased);
SET foreign_key_checks = 1;