The 'SimpleAsyncTaskExecutor-1' error raised and data can't be saved properly

[MyeongKim]

The other day I solved this error with @jcooky by making new MySQL database correctly.
Command we used was create database jandy default collate=utf8_bin default charset=utf8;

Database is created like this.

mysql> show create database jandy;
+----------+----------------------------------------------------------------+
| Database | Create Database                                                |
+----------+----------------------------------------------------------------+
| jandy    | CREATE DATABASE `jandy` /*!40100 DEFAULT CHARACTER SET utf8 */ |
+----------+----------------------------------------------------------------+
1 row in set (0.00 sec)

And this error is still raised. Could this be related with using multiple terminal window at the same time?
I doubt the change of environment variables like TRAVIS_BUILD_ID or TRAVIS_BUILD_NUMBER.

Exception in thread "SimpleAsyncTaskExecutor-1" java.lang.RuntimeException: com.mysema.query.NonUniqueResultException: Only one result is allowed for uniqueResult calls
    at io.jandy.web.api.TravisRestController.lambda$putResults$13(TravisRestController.java:137)
    at org.springframework.util.concurrent.ListenableFutureCallbackRegistry.failure(ListenableFutureCallbackRegistry.java:133)
    at org.springframework.util.concurrent.ListenableFutureTask.done(ListenableFutureTask.java:87)
    at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:384)
    at java.util.concurrent.FutureTask.set(FutureTask.java:233)
    at java.util.concurrent.FutureTask.run(FutureTask.java:274)
    at java.lang.Thread.run(Thread.java:745)
Caused by: com.mysema.query.NonUniqueResultException: Only one result is allowed for uniqueResult calls
    at com.mysema.query.jpa.impl.AbstractJPAQuery.uniqueResult(AbstractJPAQuery.java:317)
    at com.mysema.query.jpa.impl.AbstractJPAQuery.uniqueResult(AbstractJPAQuery.java:304)
    at io.jandy.domain.ProfContextDumpRepositoryImpl.findLastProfile(ProfContextDumpRepositoryImpl.java:38)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:497)
    at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.executeMethodOn(RepositoryFactorySupport.java:483)
    at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.doInvoke(RepositoryFactorySupport.java:458)
    at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.invoke(RepositoryFactorySupport.java:440)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
    at org.springframework.data.projection.DefaultMethodInvokingMethodInterceptor.invoke(DefaultMethodInvokingMethodInterceptor.java:61)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
    at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:99)
    at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:281)
    at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:96)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
    at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:136)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
    at org.springframework.data.jpa.repository.support.CrudMethodMetadataPostProcessor$CrudMethodMetadataPopulatingMethodInterceptor.invoke(CrudMethodMetadataPostProcessor.java:131)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
    at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:92)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
    at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:208)
    at com.sun.proxy.$Proxy118.findLastProfile(Unknown Source)
    at io.jandy.web.api.TravisRestController.lambda$null$11(TravisRestController.java:99)
    at org.springframework.transaction.support.TransactionTemplate.execute(TransactionTemplate.java:133)
    at io.jandy.web.api.TravisRestController.lambda$putResults$12(TravisRestController.java:85)
    at org.springframework.util.concurrent.ListenableFutureCallbackRegistry.success(ListenableFutureCallbackRegistry.java:118)
    at org.springframework.util.concurrent.ListenableFutureTask.done(ListenableFutureTask.java:71)
    ... 4 more