diff --git a/3d-viewer/3d_viewer/eda_3d_viewer_settings.cpp b/3d-viewer/3d_viewer/eda_3d_viewer_settings.cpp
index 209c029556..fc7ceb04cc 100644
--- a/3d-viewer/3d_viewer/eda_3d_viewer_settings.cpp
+++ b/3d-viewer/3d_viewer/eda_3d_viewer_settings.cpp
@@ -21,6 +21,7 @@
 #include <3d_enums.h>
 #include <common_ogl/ogl_attr_list.h>
 #include <settings/parameters.h>
+#include <settings/json_settings_internals.h>
 #include <wx/config.h>
 
 #include "eda_3d_viewer_settings.h"
@@ -28,7 +29,7 @@
 using KIGFX::COLOR4D;
 
 ///! Update the schema version whenever a migration is required
-const int viewer3dSchemaVersion = 0;
+const int viewer3dSchemaVersion = 1;
 
 
 EDA_3D_VIEWER_SETTINGS::EDA_3D_VIEWER_SETTINGS()
@@ -169,7 +170,8 @@ EDA_3D_VIEWER_SETTINGS::EDA_3D_VIEWER_SETTINGS()
                                             &m_Render.show_board_body, true ) );
     m_params.emplace_back( new PARAM<bool>( "render.show_comments",
                                             &m_Render.show_comments, true ) );
-    m_params.emplace_back( new PARAM<bool>( "render.show_eco", &m_Render.show_eco, true ) );
+    m_params.emplace_back( new PARAM<bool>( "render.show_eco",
+                                            &m_Render.show_eco, true ) );
     m_params.emplace_back( new PARAM<bool>( "render.show_footprints_insert",
                                             &m_Render.show_footprints_insert, true ) );
     m_params.emplace_back( new PARAM<bool>( "render.show_footprints_normal",
@@ -199,7 +201,27 @@ EDA_3D_VIEWER_SETTINGS::EDA_3D_VIEWER_SETTINGS()
     m_params.emplace_back( new PARAM<int>( "camera.projection_mode",
                                            &m_Camera.projection_mode, 1 ) );
 
-    m_params.emplace_back( new PARAM_OBSOLETE( "colors" ) );
+    registerMigration( 0, 1, std::bind( &EDA_3D_VIEWER_SETTINGS::migrateSchema0to1, this ) );
+}
+
+
+bool EDA_3D_VIEWER_SETTINGS::migrateSchema0to1()
+{
+    /**
+     * Schema version 0 to 1:
+     *
+     * delete colors (they're now stored in the 'user' color theme.
+     */
+    try
+    {
+        if( m_internals->contains( "colors" ) )
+            m_internals->erase( "colors" );
+    }
+    catch( ... )
+    {
+    }
+
+    return true;
 }
 
 
diff --git a/3d-viewer/3d_viewer/eda_3d_viewer_settings.h b/3d-viewer/3d_viewer/eda_3d_viewer_settings.h
index fd36bae3a5..455dc2da18 100644
--- a/3d-viewer/3d_viewer/eda_3d_viewer_settings.h
+++ b/3d-viewer/3d_viewer/eda_3d_viewer_settings.h
@@ -106,8 +106,10 @@ public:
     CAMERA_SETTINGS m_Camera;
 
 protected:
-
     virtual std::string getLegacyFrameName() const override { return "Viewer3DFrameName"; }
+
+private:
+    bool migrateSchema0to1();
 };
 
 
diff --git a/common/settings/parameters.cpp b/common/settings/parameters.cpp
index 0a31441fcd..c00c02967f 100644
--- a/common/settings/parameters.cpp
+++ b/common/settings/parameters.cpp
@@ -25,13 +25,6 @@
 #include <gal/color4d.h>
 #include <project/project_file.h>
 #include <settings/parameters.h>
-#include <settings/json_settings_internals.h>
-
-
-void PARAM_OBSOLETE::Store( JSON_SETTINGS* aSettings ) const
-{
-    aSettings->Internals()->erase( m_path );
-}
 
 
 template <typename ValueType>
diff --git a/include/settings/parameters.h b/include/settings/parameters.h
index 9e540031fb..002b454398 100644
--- a/include/settings/parameters.h
+++ b/include/settings/parameters.h
@@ -156,30 +156,6 @@ protected:
     ValueType m_default;
 };
 
-/**
- * Handles an obsolete parameter (ie: removes it on write).
- */
-class PARAM_OBSOLETE : public PARAM_BASE
-{
-public:
-    PARAM_OBSOLETE( const std::string& aJsonPath ) :
-            PARAM_BASE( aJsonPath, false )
-    { }
-
-    void Load( JSON_SETTINGS* aSettings, bool aResetIfMissing = true ) const override
-    { }
-
-    void Store( JSON_SETTINGS* aSettings ) const override;
-
-    void SetDefault() override
-    { }
-
-    bool MatchesFile( JSON_SETTINGS* aSettings ) const override
-    {
-        return !aSettings->Contains( m_path );
-    }
-};
-
 /**
  * Stores a path as a string with directory separators normalized to unix-style
  */