diff --git a/src/Content/Conversation.php b/src/Content/Conversation.php
index 03f2502d2b..0f0259aaac 100644
--- a/src/Content/Conversation.php
+++ b/src/Content/Conversation.php
@@ -36,7 +36,7 @@ use Friendica\Core\Session;
 use Friendica\Core\Theme;
 use Friendica\Database\DBA;
 use Friendica\Model\Contact;
-use Friendica\Model\Item;
+use Friendica\Model\Item as ItemModel;
 use Friendica\Model\Post;
 use Friendica\Model\Tag;
 use Friendica\Model\User;
@@ -135,7 +135,7 @@ class Conversation
 					return;
 			}
 
-			if (!empty($activity['verb']) && $this->activity->match($activity['verb'], $verb) && ($activity['gravity'] != Item::GRAVITY_PARENT)) {
+			if (!empty($activity['verb']) && $this->activity->match($activity['verb'], $verb) && ($activity['gravity'] != ItemModel::GRAVITY_PARENT)) {
 				$author = [
 					'uid'     => 0,
 					'id'      => $activity['author-id'],
@@ -755,7 +755,7 @@ class Conversation
 
 					$item['pagedrop'] = $page_dropping;
 
-					if ($item['gravity'] == Item::GRAVITY_PARENT) {
+					if ($item['gravity'] == ItemModel::GRAVITY_PARENT) {
 						$item_object = new PostObject($item);
 						$conv->addParent($item_object);
 					}
@@ -825,7 +825,7 @@ class Conversation
 		}
 
 		if (!empty($activity)) {
-			if (($row['gravity'] == Item::GRAVITY_PARENT)) {
+			if (($row['gravity'] == ItemModel::GRAVITY_PARENT)) {
 				$row['post-reason'] = Item::PR_ANNOUNCEMENT;
 
 				$row     = array_merge($row, $activity);
@@ -834,7 +834,7 @@ class Conversation
 				$row['causer-link']   = $contact['url'];
 				$row['causer-avatar'] = $contact['thumb'];
 				$row['causer-name']   = $contact['name'];
-			} elseif (($row['gravity'] == Item::GRAVITY_ACTIVITY) && ($row['verb'] == Activity::ANNOUNCE) &&
+			} elseif (($row['gravity'] == ItemModel::GRAVITY_ACTIVITY) && ($row['verb'] == Activity::ANNOUNCE) &&
 				($row['author-id'] == $activity['causer-id'])) {
 				return $row;
 			}
@@ -867,7 +867,7 @@ class Conversation
 					$row['owner-name']   = $row['causer-name'];
 				}
 
-				if (in_array($row['gravity'], [Item::GRAVITY_PARENT, Item::GRAVITY_COMMENT]) && !empty($row['causer-id'])) {
+				if (in_array($row['gravity'], [ItemModel::GRAVITY_PARENT, ItemModel::GRAVITY_COMMENT]) && !empty($row['causer-id'])) {
 					$causer = ['uid' => 0, 'id' => $row['causer-id'], 'network' => $row['causer-network'], 'url' => $row['causer-link']];
 
 					$row['reshared'] = $this->l10n->t('%s reshared this.', '<a href="'. htmlentities(Contact::magicLinkByContact($causer)) .'">' . htmlentities($row['causer-name']) . '</a>');
@@ -941,7 +941,7 @@ class Conversation
 		$activitycounter = [];
 
 		foreach ($parents as $parent) {
-			if (!empty($parent['thr-parent-id']) && !empty($parent['gravity']) && ($parent['gravity'] == Item::GRAVITY_ACTIVITY)) {
+			if (!empty($parent['thr-parent-id']) && !empty($parent['gravity']) && ($parent['gravity'] == ItemModel::GRAVITY_ACTIVITY)) {
 				$uriid = $parent['thr-parent-id'];
 				if (!empty($parent['author-id'])) {
 					$activities[$uriid] = ['causer-id' => $parent['author-id']];
@@ -993,10 +993,10 @@ class Conversation
 			}
 
 			if ($max_comments > 0) {
-				if (($row['gravity'] == Item::GRAVITY_COMMENT) && (++$commentcounter[$row['parent-uri-id']] > $max_comments)) {
+				if (($row['gravity'] == ItemModel::GRAVITY_COMMENT) && (++$commentcounter[$row['parent-uri-id']] > $max_comments)) {
 					continue;
 				}
-				if (($row['gravity'] == Item::GRAVITY_ACTIVITY) && (++$activitycounter[$row['parent-uri-id']] > $max_comments)) {
+				if (($row['gravity'] == ItemModel::GRAVITY_ACTIVITY) && (++$activitycounter[$row['parent-uri-id']] > $max_comments)) {
 					continue;
 				}
 			}
@@ -1025,7 +1025,7 @@ class Conversation
 		$this->profiler->startRecording('rendering');
 		$children = [];
 		foreach ($item_list as $i => $item) {
-			if ($item['gravity'] != Item::GRAVITY_PARENT) {
+			if ($item['gravity'] != ItemModel::GRAVITY_PARENT) {
 				if ($recursive) {
 					// Fallback to parent-uri if thr-parent is not set
 					$thr_parent = $item['thr-parent-id'];
@@ -1182,7 +1182,7 @@ class Conversation
 
 		// Extract the top level items
 		foreach ($item_array as $item) {
-			if ($item['gravity'] == Item::GRAVITY_PARENT) {
+			if ($item['gravity'] == ItemModel::GRAVITY_PARENT) {
 				$parents[] = $item;
 			}
 		}
diff --git a/src/Content/Item.php b/src/Content/Item.php
index 01699aaac6..db1753893e 100644
--- a/src/Content/Item.php
+++ b/src/Content/Item.php
@@ -31,7 +31,7 @@ use Friendica\Core\System;
 use Friendica\Database\DBA;
 use Friendica\Model\Contact;
 use Friendica\Model\Group;
-use Friendica\Model\Item as ModelItem;
+use Friendica\Model\Item as ItemModel;
 use Friendica\Model\Photo;
 use Friendica\Model\Tag;
 use Friendica\Model\Post;
@@ -331,7 +331,7 @@ class Item
 		$sub_link = $contact_url = $pm_url = $status_link = '';
 		$photos_link = $posts_link = $block_link = $ignore_link = '';
 
-		if (local_user() && local_user() == $item['uid'] && $item['gravity'] == ModelItem::GRAVITY_PARENT && !$item['self'] && !$item['mention']) {
+		if (local_user() && local_user() == $item['uid'] && $item['gravity'] == ItemModel::GRAVITY_PARENT && !$item['self'] && !$item['mention']) {
 			$sub_link = 'javascript:doFollowThread(' . $item['id'] . '); return false;';
 		}
 
@@ -392,7 +392,7 @@ class Item
 			];
 
 			if (!empty($item['language'])) {
-				$menu[$this->l10n->t('Languages')] = 'javascript:alert(\'' . ModelItem::getLanguageMessage($item) . '\');';
+				$menu[$this->l10n->t('Languages')] = 'javascript:alert(\'' . ItemModel::getLanguageMessage($item) . '\');';
 			}
 
 			if ((($cid == 0) || ($rel == Contact::FOLLOWER)) &&
@@ -470,7 +470,7 @@ class Item
 			}
 			$item['inform'] .= 'cid:' . $contact['id'];
 
-			if (($item['gravity'] == ModelItem::GRAVITY_COMMENT) || empty($contact['cid']) || ($contact['contact-type'] != Contact::TYPE_COMMUNITY)) {
+			if (($item['gravity'] == ItemModel::GRAVITY_COMMENT) || empty($contact['cid']) || ($contact['contact-type'] != Contact::TYPE_COMMUNITY)) {
 				continue;
 			}
 
@@ -492,9 +492,9 @@ class Item
 		}
 		Logger::info('Got inform', ['inform' => $item['inform']]);
 
-		if (($item['gravity'] == ModelItem::GRAVITY_PARENT) && !empty($forum_contact) && ($private_forum || $only_to_forum)) {
+		if (($item['gravity'] == ItemModel::GRAVITY_PARENT) && !empty($forum_contact) && ($private_forum || $only_to_forum)) {
 			// we tagged a forum in a top level post. Now we change the post
-			$item['private'] = $private_forum ? ModelItem::PRIVATE : ModelItem::UNLISTED;
+			$item['private'] = $private_forum ? ItemModel::PRIVATE : ItemModel::UNLISTED;
 
 			if ($only_to_forum) {
 				$item['postopts'] = '';
@@ -510,14 +510,14 @@ class Item
 				$item['allow_cid'] = '';
 				$item['allow_gid'] = '';
 			}
-		} elseif ($setPermissions && ($item['gravity'] == ModelItem::GRAVITY_PARENT)) {
+		} elseif ($setPermissions && ($item['gravity'] == ItemModel::GRAVITY_PARENT)) {
 			if (empty($receivers)) {
 				// For security reasons direct posts without any receiver will be posts to yourself
 				$self = Contact::selectFirst(['id'], ['uid' => $item['uid'], 'self' => true]);
 				$receivers[] = $self['id'];
 			}
 
-			$item['private']   = ModelItem::PRIVATE;
+			$item['private']   = ItemModel::PRIVATE;
 			$item['allow_cid'] = '';
 			$item['allow_gid'] = '';
 			$item['deny_cid']  = '';