When i want to connect my Loopback model to the datasource it is always showing this error
events.js:141
throw er; // Unhandled 'error' event
^
ValidationError: The `DataSourceDefinition` instance is not valid. Details: `name` is not unique (value: "mongoDs").
at /usr/lib/node_modules/strongloop/node_modules/loopback-datasource-juggler/lib/dao.js:330:12
at ModelConstructor.<anonymous> (/usr/lib/node_modules/strongloop/node_modules/loopback-datasource-juggler/lib/validations.js:511:13)
at ModelConstructor.next (/usr/lib/node_modules/strongloop/node_modules/loopback-datasource-juggler/lib/hooks.js:82:12)
at done (/usr/lib/node_modules/strongloop/node_modules/loopback-datasource-juggler/lib/validations.js:508:25)
at /usr/lib/node_modules/strongloop/node_modules/loopback-datasource-juggler/lib/validations.js:586:7
at ModelConstructor.<anonymous> (/usr/lib/node_modules/strongloop/node_modules/loopback-datasource-juggler/lib/validations.js:380:5)
at /usr/lib/node_modules/strongloop/node_modules/loopback-datasource-juggler/lib/dao.js:2006:11
at /usr/lib/node_modules/strongloop/node_modules/loopback-datasource-juggler/node_modules/async/lib/async.js:396:17
at done (/usr/lib/node_modules/strongloop/node_modules/loopback-datasource-juggler/node_modules/async/lib/async.js:167:19)
at /usr/lib/node_modules/strongloop/node_modules/loopback-datasource-juggler/node_modules/async/lib/async.js:40:16
at /usr/lib/node_modules/strongloop/node_modules/loopback-datasource-juggler/node_modules/async/lib/async.js:393:21
at /usr/lib/node_modules/strongloop/node_modules/loopback-datasource-juggler/lib/dao.js:1983:17
at doNotify (/usr/lib/node_modules/strongloop/node_modules/loopback-datasource-juggler/lib/observer.js:99:49)
at doNotify (/usr/lib/node_modules/strongloop/node_modules/loopback-datasource-juggler/lib/observer.js:99:49)
at doNotify (/usr/lib/node_modules/strongloop/node_modules/loopback-datasource-juggler/lib/observer.js:99:49)
at doNotify (/usr/lib/node_modules/strongloop/node_modules/loopback-datasource-juggler/lib/observer.js:99:49)
lot of time wasted while working on this one.