Some abnormal logs I can't google it.

[JMing]

Hello everyone,

After I executed I2C stress test on system it will occur abnormal logs.
I can't google these abnormal logs about what?
These logs seems like doesn't impact system?
Does someone help me these logs are Okay?
Thanks for your help.

journal: (Sparql buffer) Error in task 0 of the array-update: column nie:url is not unique (strerror of errno (not necessarily related): No such file or directory)

journal: Could not execute sparql: column nie:url is not unique (strerror of errno (not necessarily related): No such file or directory)

journal: g_object_unref: assertion 'G_IS_OBJECT (object)' failed