error: duplicate key value violates unique constraint "mat-change_pkey"

[BerkeleyTrue]

Using loopback 2.4.1
loopback-connector-postgresql 1.1.4

Start with empty database set up with automigrate. Have a model with change tracking enabled. Create a new model. Model is successfully created. Then server crashes with the following error. Seems to also create the change model in the database.

Error: error: duplicate key value violates unique constraint "mat-change_pkey"
    at cb (/Users/berkeley/node/loopback/gems/node_modules/loopback/lib/models/change.js:170:19)
    at /Users/berkeley/node/loopback/gems/node_modules/loopback-datasource-juggler/lib/dao.js:173:20
    at /Users/berkeley/node/loopback/gems/node_modules/loopback-connector-postgresql/lib/postgresql.js:280:14
    at null.callback (/Users/berkeley/node/loopback/gems/node_modules/loopback-connector-postgresql/lib/postgresql.js:143:5)
    at Query.handleError (/Users/berkeley/node/loopback/gems/node_modules/loopback-connector-postgresql/node_modules/pg.js/lib/query.js:99:17)
    at null.<anonymous> (/Users/berkeley/node/loopback/gems/node_modules/loopback-connector-postgresql/node_modules/pg.js/lib/client.js:167:26)
    at emit (events.js:95:17)
    at Socket.<anonymous> (/Users/berkeley/node/loopback/gems/node_modules/loopback-connector-postgresql/node_modules/pg.js/lib/connection.js:109:12)
    at Socket.emit (events.js:95:17)
    at Socket.<anonymous> (_stream_readable.js:764:14)

[BerkeleyTrue]

This seems to be a problem with the loopback change model, as switching to mongodb has the same issue. Will file an issue there.

[BerkeleyTrue]

Solved: strongloop/loopback#668