diff --git a/db_structure.xml b/db_structure.xml
index 933b09988f0b77b4cb25c6a5cc048a2e8b05a1e8..cefb7fc52c91c31a6300d966736554936a4707bc 100644
--- a/db_structure.xml
+++ b/db_structure.xml
@@ -70,7 +70,7 @@
 				<name>id</name>
 				<type>text</type>
 				<default></default>
-				<notnull>true</notnull>
+				<notnull>false</notnull>
 				<length>64</length>
 			</field>
 
@@ -220,7 +220,7 @@
 				<name>path</name>
 				<type>text</type>
 				<default></default>
-				<notnull>true</notnull>
+				<notnull>false</notnull>
 				<length>512</length>
 			</field>
 
@@ -244,7 +244,7 @@
 				<name>name</name>
 				<type>text</type>
 				<default></default>
-				<notnull>true</notnull>
+				<notnull>false</notnull>
 				<length>250</length>
 			</field>