Database Runtime Exception while inserting a row in a column that doesn't appear in source code

While running my app, logcat is showing an exception:

  09-28 16:37:33.364     853-2228/? E/SQLiteDatabase? Error inserting
      android.database.sqlite.SQLiteConstraintException: column context_id is not unique (code 19)
              at android.database.sqlite.SQLiteConnection.nativeExecuteForLastInsertedRowId(Native Method)
              at android.database.sqlite.SQLiteConnection.executeForLastInsertedRowId(SQLiteConnection.java:782)
              at android.database.sqlite.SQLiteSession.executeForLastInsertedRowId(SQLiteSession.java:788)
              at android.database.sqlite.SQLiteStatement.executeInsert(SQLiteStatement.java:86)
              at android.database.sqlite.SQLiteDatabase.insertWithOnConflict(SQLiteDatabase.java:1471)
              at android.database.sqlite.SQLiteDatabase.insert(SQLiteDatabase.java:1339)
              at com.google.android.contextmanager.q.al.a(SourceFile:408)
              at com.google.android.contextmanager.q.al.b(SourceFile:383)
              at com.google.android.contextmanager.q.al.a(SourceFile:349)
              at com.google.android.contextmanager.q.al.b(SourceFile:376)
              at com.google.android.contextmanager.g.a.j.a(SourceFile:58)
              at com.google.android.contextmanager.g.a.a.run(SourceFile:52)
              at com.google.android.contextmanager.g.i.handleMessage(SourceFile:215)
              at android.os.Handler.dispatchMessage(Handler.java:102)
              at android.os.Looper.loop(Looper.java:149)
              at android.os.HandlerThread.run(HandlerThread.java:61)

My problem is, context_id column doesn't appear when I do a full search in whole project. The exception info point to classes from android libs, not my code.

Any clues, how to track this exception?