Cypher error when making a commit

[dany-fu]

Error is thrown when calling the/branch/commitTo endpoint. This can be reproduced on the current version_control branch

2019-03-01 15:28:20.025  WARN 26182 --- [nio-8080-exec-7] o.n.o.drivers.http.request.HttpRequest   : Thread: 54, response: Unrecognized transaction id. Transaction may have timed out and been rolled back.
2019-03-01 15:28:20.027  WARN 26182 --- [nio-8080-exec-7] o.n.ogm.drivers.http.driver.HttpDriver   : http://localhost:7474/db/data/transaction/87
2019-03-01 15:28:20.046 ERROR 26182 --- [nio-8080-exec-7] o.a.c.c.C.[.[.[/].[dispatcherServlet]    : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is org.springframework.dao.DataAccessResourceFailureException: Error executing Cypher "Neo.TransientError.Network.CommunicationError"; Code: Neo.TransientError.Network.CommunicationError; Description: Can not start an object, expecting field name; nested exception is org.neo4j.ogm.exception.CypherException: Error executing Cypher "Neo.TransientError.Network.CommunicationError"; Code: Neo.TransientError.Network.CommunicationError; Description: Can not start an object, expecting field name] with root cause

org.neo4j.ogm.exception.CypherException: Error executing Cypher "Neo.TransientError.Network.CommunicationError"; Code: Neo.TransientError.Network.CommunicationError; Description: Can not start an object, expecting field name