jdbcapi/ConcurrencyTest not able to drop table in soft upgrade mode

1. Created at database system/wombat with ij version 10.2
2. Ran jdbcapi/ConcurrencyTest with same current directory. All test cases but the first test fail with:

30) testTruncateDuringScan(org.apache.derbyTesting.functionTests.tests.jdbcapi.ConcurrencyTest)junit.framework.ComparisonFailure: 'drop table t1' failed with unexpected SQL State expected:<[42Y55]> but was:<[XSDA7]>
at org.apache.derbyTesting.functionTests.tests.jdbcapi.SURDataModelSetup.createDataModel(SURDataModelSetup.java:70)
at org.apache.derbyTesting.functionTests.tests.jdbcapi.SURDataModelSetup.createDataModel(SURDataModelSetup.java:125)
at org.apache.derbyTesting.functionTests.tests.jdbcapi.ConcurrencyTest.setUp(ConcurrencyTest.java:54)
at org.apache.derbyTesting.junit.BaseTestCase.runBare(BaseTestCase.java:88)
at junit.extensions.TestDecorator.basicRun(TestDecorator.java:24)
at junit.extensions.TestSetup$1.protect(TestSetup.java:21)
at junit.extensions.TestSetup.run(TestSetup.java:25)
at org.apache.derbyTesting.junit.BaseTestSetup.run(BaseTestSetup.java:57)
at junit.extensions.TestDecorator.basicRun(TestDecorator.java:24)
at junit.extensions.TestSetup$1.protect(TestSetup.java:21)
at junit.extensions.TestSetup.run(TestSetup.java:25)
at junit.extensions.TestDecorator.basicRun(TestDecorator.java:24)
at junit.extensions.TestSetup$1.protect(TestSetup.java:21)
at junit.extensions.TestSetup.run(TestSetup.java:25)
at org.apache.derbyTesting.junit.BaseTestSetup.run(BaseTestSetup.java:57)