error

Error: EstimateCondition (conditions) is not associated to EstimateCondition!
    at Model.validateIncludedElement (/home/mfq/workspace//grazer-backend/node_modules/sequelize/lib/model.js:558:11)
    at /home/mfq/workspace//grazer-backend/node_modules/sequelize/lib/model.js:440:29
    at Array.map (native)
    at Model.validateIncludedElements (/home/mfq/workspace//grazer-backend/node_modules/sequelize/lib/model.js:436:37)
    at Model.build (/home/mfq/workspace//grazer-backend/node_modules/sequelize/lib/model.js:1760:32)
    at Model.create (/home/mfq/workspace//grazer-backend/node_modules/sequelize/lib/model.js:1815:15)
    at Model.models.EstimateCondition.findById.then (/home/mfq/workspace//grazer-backend/controllers/estimations.js:175:39)
    at bound (domain.js:280:14)
    at Model.runBound (domain.js:293:12)
    at Model.tryCatcher (/home/mfq/workspace//grazer-backend/node_modules/bluebird/js/release/util.js:16:23)
    at Promise._settlePromiseFromHandler (/home/mfq/workspace//grazer-backend/node_modules/bluebird/js/release/promise.js:512:31)
    at Promise._settlePromise (/home/mfq/workspace//grazer-backend/node_modules/bluebird/js/release/promise.js:569:18)
    at Promise._settlePromise0 (/home/mfq/workspace//grazer-backend/node_modules/bluebird/js/release/promise.js:614:10)
    at Promise._settlePromises (/home/mfq/workspace//grazer-backend/node_modules/bluebird/js/release/promise.js:693:18)
    at Async._drainQueue (/home/mfq/workspace//grazer-backend/node_modules/bluebird/js/release/async.js:133:16)
    at Async._drainQueues (/home/mfq/workspace//grazer-backend/node_modules/bluebird/js/release/async.js:143:10)