Error: Mutations fields must be an object with field names as keys or a function which returns such an object.

[morenoh149]

Not sure if I should ask here or upstream. I'm trying to run this tool on an existing api running sequelize.

$ node index.js
{"name":"foo","version":"0.0.1","event":"state","state":"booting"}
/Users/harrymoreno/programming/foo/node_modules/graphql/jsutils/invariant.js:19
    throw new Error(message);
    ^

Error: Mutations fields must be an object with field names as keys or a function which returns such an object.
    at invariant (/Users/harrymoreno/programming/foo/node_modules/graphql/jsutils/invariant.js:19:11)
    at defineFieldMap (/Users/harrymoreno/programming/foo/node_modules/graphql/type/definition.js:324:27)
    at GraphQLObjectType.getFields (/Users/harrymoreno/programming/foo/node_modules/graphql/type/definition.js:285:44)
    at /Users/harrymoreno/programming/foo/node_modules/graphql/type/schema.js:207:27
    at typeMapReducer (/Users/harrymoreno/programming/foo/node_modules/graphql/type/schema.js:219:7)
    at Array.reduce (native)
    at new GraphQLSchema (/Users/harrymoreno/programming/foo/node_modules/graphql/type/schema.js:95:34)
    at getSchema (/Users/harrymoreno/programming/foo/node_modules/graphql-sequelize-crud/lib/index.js:887:10)

Is my data model not compatible with graphql?

[Glavin001]

Please provide a sample code snippet which can be used to reproduce this error.