Avoid an error in sqlite3expert if the database has existing indexes on expressions.
FossilOrigin-Name: f1d76c8636866424fe0b57d8814b8bb1a0ed4e2ca1b75d8e308d4b962ad8dc3b
D
dan committed
3c90b8637239c31084445fa0b515afc1deaddcdb
Parent: 7d24e6b