| parent-uri | uri of the parent to this item | varchar(255) | NO | MUL | | |
| extid | | varchar(255 | NO | MUL | | |
| thr-parent | If the parent of this item is not the top-level item in the conversation, the uri of the immediate parent; otherwise set to parent-uri | varchar(255) | NO | | | |
-| created | Creation timestamp. | datetime | NO | | 0000-00-00 00:00:00 | |
-| edited | Date of last edit (default is created) | datetime | NO | | 0000-00-00 00:00:00 | |
-| commented | Date of last comment/reply to this item | datetime | NO | | 0000-00-00 00:00:00 | |
-| received | datetime | datetime | NO | | 0000-00-00 00:00:00 | |
-| changed | Date that something in the conversation changed, indicating clients should fetch the conversation again | datetime | NO | | 0000-00-00 00:00:00 | |
+| created | Creation timestamp. | datetime | NO | | 0001-01-01 00:00:00 | |
+| edited | Date of last edit (default is created) | datetime | NO | | 0001-01-01 00:00:00 | |
+| commented | Date of last comment/reply to this item | datetime | NO | | 0001-01-01 00:00:00 | |
+| received | datetime | datetime | NO | | 0001-01-01 00:00:00 | |
+| changed | Date that something in the conversation changed, indicating clients should fetch the conversation again | datetime | NO | | 0001-01-01 00:00:00 | |
| owner-name | Name of the owner of this item | varchar(255) | NO | | | |
| owner-link | Link to the profile page of the owner of this item | varchar(255) | NO | | | |
| owner-avatar | Link to the avatar picture of the owner of this item | varchar(255) | NO | | | |