chestshop WARN spam

[09:02:03 WARN]: java.sql.SQLException: Unable to run insert stmt on object com.Acrobot.ChestShop.Database.Account@6766ff6a: INSERT INTO `accounts` (`name` ,`shortName` ,`uuid` ) VALUES (?,?,?)
[09:02:03 WARN]: 	at com.Acrobot.ChestShop.ORMlite.misc.SqlExceptionUtil.create(SqlExceptionUtil.java:22)
[09:02:03 WARN]: 	at com.Acrobot.ChestShop.ORMlite.stmt.mapped.MappedCreate.insert(MappedCreate.java:135)
[09:02:03 WARN]: 	at com.Acrobot.ChestShop.ORMlite.stmt.StatementExecutor.create(StatementExecutor.java:450)
[09:02:03 WARN]: 	at com.Acrobot.ChestShop.ORMlite.dao.BaseDaoImpl.create(BaseDaoImpl.java:310)
[09:02:03 WARN]: 	at com.Acrobot.ChestShop.ORMlite.dao.BaseDaoImpl.createOrUpdate(BaseDaoImpl.java:336)
[09:02:03 WARN]: 	at com.Acrobot.ChestShop.UUIDs.NameManager$1.run(NameManager.java:162)
[09:02:03 WARN]: 	at org.bukkit.craftbukkit.v1_8_R1.scheduler.CraftTask.run(CraftTask.java:71)
[09:02:03 WARN]: 	at org.bukkit.craftbukkit.v1_8_R1.scheduler.CraftAsyncTask.run(CraftAsyncTask.java:53)
[09:02:03 WARN]: 	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
[09:02:03 WARN]: 	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
[09:02:03 WARN]: 	at java.lang.Thread.run(Thread.java:745)
[09:02:03 WARN]: Caused by: java.sql.SQLException: [SQLITE_CONSTRAINT]  Abort due to constraint violation (accounts.lastSeenName may not be NULL)
[09:02:03 WARN]: 	at org.sqlite.DB.newSQLException(DB.java:383)
[09:02:03 WARN]: 	at org.sqlite.DB.newSQLException(DB.java:387)
[09:02:03 WARN]: 	at org.sqlite.DB.execute(DB.java:342)
[09:02:03 WARN]: 	at org.sqlite.DB.executeUpdate(DB.java:363)
[09:02:03 WARN]: 	at org.sqlite.PrepStmt.executeUpdate(PrepStmt.java:85)
[09:02:03 WARN]: 	at com.Acrobot.ChestShop.ORMlite.jdbc.JdbcDatabaseConnection.insert(JdbcDatabaseConnection.java:170)
[09:02:03 WARN]: 	at com.Acrobot.ChestShop.ORMlite.stmt.mapped.MappedCreate.insert(MappedCreate.java:91)
[09:02:03 WARN]: 	... 9 more