Error while searching and error in the mongoDB

[ogerly]

I have a problem with the search.
I have on my server two forums.
my MongoDB has both networks.
The search returns an error message in both.

Network 1

 9/1 11:19 [8742] - error: [plugins] filter:search.query,  Unable to execute query: error processing query: ns=1.searchpost limit=50 skip=0
 Tree: TEXT : query=dres, language=, tag=NULL
 Sort: {}
 Proj: { _id: 0, id: 1 }
  planner returned error: need exactly one text index for $text query
 9/1 11:19 [8742] - error: /api/search/dres
  MongoError: Unable to execute query: error processing query: ns=1.searchpost limit=50 skip=0
 Tree: TEXT : query=dres, language=, tag=NULL
 Sort: {}
 Proj: { _id: 0, id: 1 }
  planner returned error: need exactly one text index for $text query
at Function.MongoError.create      (/NodeBB/node_modules/mongodb/node_modules/mong     odb-core/lib/error.js:31:11)
at queryCallback (/NodeBB/node_modules/mongodb/node_modules/mongodb-core/lib/cursor.js:266:34)
at Callbacks.emit (/NodeBB/node_modules/mongodb/node_modules/mongodb-core/lib/topologies/server.js:95:3)
at null.messageHandler (/NodeBB/node_modules/mongodb/node_modules/mongodb-core/lib/topologies/server.js:249:23)
at Socket.<anonymous> (/NodeBB/node_modules/mongodb/node_modules/mongodb-core/lib/connection/connection.js:265:22)
at Socket.emit (events.js:95:17)
at Socket.<anonymous> (_stream_readable.js:748:14)
at Socket.emit (events.js:92:17)
at emitReadable_ (_stream_readable.js:410:10)
at emitReadable (_stream_readable.js:406:5)
 9/1 11:19 [8742] - error: [plugins] filter:search.query,  Unable to execute query: error processing query: ns=1.searchtopic limit=50 skip=0
 Tree: TEXT : query=dres, language=, tag=NULL
 Sort: {}
 Proj: { _id: 0, id: 1 }
  planner returned error: need exactly one text index for $text query

---

Network 2

9/1 11:25 [28360] - error: [plugins] filter:search.query,  Unable to execute query: error processing query: ns=0.searchpost limit=20 skip=0
Tree: TEXT : query=hallo, language=, tag=NULL
Sort: {}
Proj: { _id: 0, id: 1 }
 planner returned error: need exactly one text index for $text query
9/1 11:25 [28360] - error: /api/search/hallo
 MongoError: Unable to execute query: error processing query: ns=0.searchpost     limit=20 skip=0
Tree: TEXT : query=hallo, language=, tag=NULL
Sort: {}
Proj: { _id: 0, id: 1 }
 planner returned error: need exactly one text index for $text query
at Function.MongoError.create (/nodebb/node_modules/mongodb/node_modules/mongodb-core/lib/error.js:31:11)
at queryCallback (/nodebb/node_modules/mongodb/node_modules/mongodb-core/lib/cursor.js:266:34)
at Callbacks.emit (/nodebb/node_modules/mongodb/node_modules/mongodb-core/lib/topologies/server.js:95:3)
at null.messageHandler (/nodebb/node_modules/mongodb/node_modules/mongodb-core/lib/topologies/server.js:249:23)
at Socket.<anonymous> (/nodebb/node_modules/mongodb/node_modules/mongodb-core/lib/connection/connection.js:265:22)
at Socket.emit (events.js:95:17)
at Socket.<anonymous> (_stream_readable.js:748:14)
at Socket.emit (events.js:92:17)
at emitReadable_ (_stream_readable.js:410:10)
at emitReadable (_stream_readable.js:406:5)
9/1 11:25 [28360] - error: [plugins] filter:search.query,  Unable to execute query: error processing query: ns=0.searchtopic limit=20 skip=0
Tree: TEXT : query=hallo, language=, tag=NULL
Sort: {}
Proj: { _id: 0, id: 1 }
 planner returned error: need exactly one text index for $text query
9/1 11:25 [28360] - error: [plugins] filter:search.query,  Unable to execute query: error processing query: ns=0.searchtopic limit=20 skip=0
Tree: TEXT : query=Population Boom 89'  - Gibt es eine Überbevölkerung ?, language=, tag=NULL
Sort: {}
Proj: { _id: 0, id: 1 }
 planner returned error: need exactly one text index for $text query
9/1 11:25 [28360] - error: [plugins] filter:widget.render:suggestedtopics,      Unable to execute query: error processing query: ns=0.searchtopic limit=20 skip=0
Tree: TEXT : query=Population Boom 89'  - Gibt es eine Überbevölkerung ?, language=,     tag=NULL
Sort: {}
Proj: { _id: 0, id: 1 }
 planner returned error: need exactly one text index for $text query
9/1 11:25 [28360] - error: /api/widgets/render
 MongoError: Unable to execute query: error processing query: ns=0.searchtopic     limit=20 skip=0
Tree: TEXT : query=Population Boom 89'  - Gibt es eine Überbevölkerung ?, language=,     tag=NULL
Sort: {}
Proj: { _id: 0, id: 1 }
 planner returned error: need exactly one text index for $text query
at Function.MongoError.create     (/nodebb/node_modules/mongodb/node_modules/mongodb-core/lib/error.js:31:11)
at queryCallback     (/nodebb/node_modules/mongodb/node_modules/mongo    db-core/lib/cursor.js:266:34)
at Callbacks.emit (/nodebb/node_modules/mongodb/node_modules/mongodb-core/lib/topologies/server.js:95:3)
at null.messageHandler (/nodebb/node_modules/mongodb/node_modules/mongodb-core/lib/topologies/server.js:249:23)
at Socket.<anonymous> (/nodebb/node_modules/mongodb/node_modules/mongodb-core/lib/connection/connection.js:265:22)
at Socket.emit (events.js:95:17)
at Socket.<anonymous> (_stream_readable.js:748:14)
at Socket.emit (events.js:92:17)
at emitReadable_ (_stream_readable.js:410:10)
at emitReadable (_stream_readable.js:406:5)