diff --git a/server/src/main/kotlin/suwayomi/tachidesk/graphql/types/SourceType.kt b/server/src/main/kotlin/suwayomi/tachidesk/graphql/types/SourceType.kt
index a2d03cb1a..7be34d56e 100644
--- a/server/src/main/kotlin/suwayomi/tachidesk/graphql/types/SourceType.kt
+++ b/server/src/main/kotlin/suwayomi/tachidesk/graphql/types/SourceType.kt
@@ -342,7 +342,7 @@ fun updateFilterList(
 sealed interface Preference
 
 data class SwitchPreference(
-    val key: String,
+    val key: String?,
     val title: String?,
     val summary: String?,
     val visible: Boolean,
@@ -352,7 +352,7 @@ data class SwitchPreference(
 ) : Preference
 
 data class CheckBoxPreference(
-    val key: String,
+    val key: String?,
     val title: String?,
     val summary: String?,
     val visible: Boolean,
@@ -362,7 +362,7 @@ data class CheckBoxPreference(
 ) : Preference
 
 data class EditTextPreference(
-    val key: String,
+    val key: String?,
     val title: String?,
     val summary: String?,
     val visible: Boolean,
@@ -375,7 +375,7 @@ data class EditTextPreference(
 ) : Preference
 
 data class ListPreference(
-    val key: String,
+    val key: String?,
     val title: String?,
     val summary: String?,
     val visible: Boolean,
@@ -387,7 +387,7 @@ data class ListPreference(
 ) : Preference
 
 data class MultiSelectListPreference(
-    val key: String,
+    val key: String?,
     val title: String?,
     val summary: String?,
     val visible: Boolean,
diff --git a/server/src/main/kotlin/suwayomi/tachidesk/manga/impl/Source.kt b/server/src/main/kotlin/suwayomi/tachidesk/manga/impl/Source.kt
index 4a35b9249..3fcf1b0bf 100644
--- a/server/src/main/kotlin/suwayomi/tachidesk/manga/impl/Source.kt
+++ b/server/src/main/kotlin/suwayomi/tachidesk/manga/impl/Source.kt
@@ -134,7 +134,6 @@ object Source {
         position: Int,
         value: String,
         getValue: (Preference) -> Any = { pref ->
-            println(jsonMapper::class.java.name)
             when (pref.defaultValueType) {
                 "String" -> value
                 "Boolean" -> value.toBoolean()