Client thread/ERROR

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[10:06:25] [Client thread/ERROR]: Item entity 89180 has no item?!
[10:06:27] [Client thread/ERROR]: Item entity 89181 has no item?!
[10:06:27] [Client thread/ERROR]: Item entity 89181 has no item?!
[10:06:27] [Client thread/ERROR]: Item entity 89181 has no item?!
[10:06:27] [Client thread/ERROR]: Item entity 89181 has no item?!
[10:06:27] [Client thread/ERROR]: Item entity 89181 has no item?!
[10:06:28] [Client thread/ERROR]: Item entity 89182 has no item?!
======

Please see the log file...