diff --git a/docs/Developer Guide/Developer Guide/Old documentation/Development and architecture/Database/blobs.md b/docs/Developer Guide/Developer Guide/Old documentation/Development and architecture/Database/blobs.md
index 83ad36bcb..767e45672 100644
--- a/docs/Developer Guide/Developer Guide/Old documentation/Development and architecture/Database/blobs.md	
+++ b/docs/Developer Guide/Developer Guide/Old documentation/Development and architecture/Database/blobs.md	
@@ -1,2 +1,2 @@
 # blobs
-<figure class="table"><table><thead><tr><th>Column Name</th><th>Data Type</th><th>Nullity</th><th>Default value</th><th>Description</th></tr></thead><tbody><tr><th><code>blobId</code></th><td>Text</td><td>Non-null</td><td>&nbsp;</td><td>The unique ID of the blob (e.g. <code>XXbfAJXqWrYnSXcelLFA</code>).</td></tr><tr><th><code>content</code></th><td>Text</td><td>Nullable</td><td><code>null</code></td><td><p>The content of the blob, can be either:</p><ul><li>text (for plain text notes or HTML notes).</li><li>binary (for images and other types of attachments)</li></ul></td></tr><tr><th><code>dateModified</code></th><td>Text</td><td>Non-null</td><td>&nbsp;</td><td>Localized modification date (e.g. <code>2023-11-08 18:43:44.204+0200</code>)</td></tr><tr><th><code>utcDateModified</code></th><td>Text</td><td>Non-null</td><td>&nbsp;</td><td>Modification date in UTC format (e.g. <code>2023-11-08 16:43:44.204Z</code>)</td></tr></tbody></table></figure>
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+<figure class="table"><table><thead><tr><th>Column Name</th><th>Data Type</th><th>Nullity</th><th>Default value</th><th>Description</th></tr></thead><tbody><tr><th><code>blobId</code></th><td>Text</td><td>Non-null</td><td>&nbsp;</td><td>The unique ID of the blob (e.g. <code>XXbfAJXqWrYnSXcelLFA</code>).<p>Important: this ID is actually a hash of the content, see <code>AbstractBeccaEntity#saveBlob</code>! It is a logic error to modify an existing blob.</p></td></tr><tr><th><code>content</code></th><td>Text</td><td>Nullable</td><td><code>null</code></td><td><p>The content of the blob, can be either:</p><ul><li>text (for plain text notes or HTML notes).</li><li>binary (for images and other types of attachments)</li></ul></td></tr><tr><th><code>dateModified</code></th><td>Text</td><td>Non-null</td><td>&nbsp;</td><td>Creation date with timezone offset (e.g. <code>2023-11-08 18:43:44.204+0200</code>)</td></tr><tr><th><code>utcDateModified</code></th><td>Text</td><td>Non-null</td><td>&nbsp;</td><td>Creation date in UTC format (e.g. <code>2023-11-08 16:43:44.204Z</code>).<p>Blobs cannot be modified, so this timestamp specifies when the blob was created.</p></td></tr></tbody></table></figure>
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diff --git a/docs/Developer Guide/Developer Guide/Old documentation/Development and architecture/Database/entity_changes.md b/docs/Developer Guide/Developer Guide/Old documentation/Development and architecture/Database/entity_changes.md
index 4d67b6e13..5a2327358 100644
--- a/docs/Developer Guide/Developer Guide/Old documentation/Development and architecture/Database/entity_changes.md	
+++ b/docs/Developer Guide/Developer Guide/Old documentation/Development and architecture/Database/entity_changes.md	
@@ -1,2 +1,4 @@
-# entity_changes
-<figure class="table"><table><thead><tr><th>Column Name</th><th>Data Type</th><th>Nullity</th><th>Default value</th><th>Description</th></tr></thead><tbody><tr><th><code>id</code></th><td>Integer</td><td>Nullable</td><td>&nbsp;</td><td>A sequential numeric index of the entity change.</td></tr><tr><th><code>entityName</code></th><td>Text</td><td>Nullable</td><td>&nbsp;</td><td>The type of entity being changed (<code>attributes</code>, <code>branches</code>, <code>note_reordering</code>, etc.)</td></tr><tr><th><code>entityId</code></th><td>Text</td><td>Nullable</td><td>&nbsp;</td><td>The ID of the entity being changed.</td></tr><tr><th><code>hash</code></th><td>Text</td><td>Nullable</td><td>&nbsp;</td><td>TODO: Describe how the hash is calculated</td></tr><tr><th><code>isErased</code></th><td>Integer</td><td>Nullable</td><td>&nbsp;</td><td>TODO: What does this do?</td></tr><tr><th><code>changeId</code></th><td>Text</td><td>Nullable</td><td>&nbsp;</td><td>TODO: What does this do?</td></tr><tr><th><code>componentId</code></th><td>Text</td><td>Nullable</td><td>&nbsp;</td><td>TODO: What does this do?</td></tr><tr><th><code>instanceId</code></th><td>Text</td><td>Nullable</td><td>&nbsp;</td><td>TODO: What does this do?</td></tr><tr><th><code>isSynced</code></th><td>Integer</td><td>Nullable</td><td>&nbsp;</td><td>TODO: What does this do?</td></tr><tr><th><code>utcDateChanged</code></th><td>Text</td><td>Nullable</td><td>&nbsp;</td><td>Date of the entity change in UTC format (e.g. <code>2023-11-08 16:43:44.204Z</code>)</td></tr></tbody></table></figure>
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+# entity_changes
+<figure class="table"><table><thead><tr><th>Column Name</th><th>Data Type</th><th>Nullity</th><th>Default value</th><th>Description</th></tr></thead><tbody><tr><th><code>id</code></th><td>Integer</td><td>Non-null</td><td>&nbsp;</td><td>A sequential numeric index of the entity change.</td></tr><tr><th><code>entityName</code></th><td>Text</td><td>Non-null</td><td>&nbsp;</td><td>The type of entity being changed (<code>attributes</code>, <code>branches</code>, <code>note_reordering</code>, etc.)</td></tr><tr><th><code>entityId</code></th><td>Text</td><td>Non-null</td><td>&nbsp;</td><td>The ID of the entity being changed.</td></tr><tr><th><code>hash</code></th><td>Text</td><td>Nullable (*)</td><td>&nbsp;</td><td>TODO: Describe how the hash is calculated</td></tr><tr><th><code>isErased</code></th><td>Integer (1 or 0)</td><td>Nullable (*)</td><td>&nbsp;</td><td>TODO: What does this do?</td></tr><tr><th><code>changeId</code></th><td>Text</td><td>Nullable (*)</td><td>&nbsp;</td><td>TODO: What does this do?</td></tr><tr><th><code>componentId</code></th><td>Text</td><td>Nullable (*)</td><td>&nbsp;</td><td><p>The ID of the UI component that caused this change.</p><p>Examples: <code>date-note</code>, <code>F-PoZMI0vc</code>, <code>NA</code> (catch all)</p></td></tr><tr><th><code>instanceId</code></th><td>Text</td><td>Nullable (*)</td><td>&nbsp;</td><td>The ID of the <a href="#root/pOsGYCXsbNQG/tC7s2alapj8V/Gzjqa934BdH4/c5xB8m4g2IY6">instance</a> that created this change.</td></tr><tr><th><code>isSynced</code></th><td>Integer (1 or 0)</td><td>Non-null</td><td>&nbsp;</td><td>TODO: What does this do?</td></tr><tr><th><code>utcDateChanged</code></th><td>Text</td><td>Non-null</td><td>&nbsp;</td><td>Date of the entity change in UTC format (e.g. <code>2023-11-08 16:43:44.204Z</code>)</td></tr></tbody></table></figure>
+
+Nullable (\*) means all new values are non-null, old rows may contain null values.
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