diff --git a/src/modules/config_declaration.js b/src/modules/config_declaration.js
deleted file mode 100644
index 0d2f00e38..000000000
--- a/src/modules/config_declaration.js
+++ /dev/null
@@ -1,47 +0,0 @@
-import { storage } from 'src/lib/storage.js'
-
-export const CONFIG_MIGRATION = 1
-
-import { v4 as uuidv4 } from 'uuid'
-
-// for future use
-/*
-const simpleDeclaration = {
-  store: 'server-side',
-  migrationFlag: 'configMigration',
-  migration(serverside, rootState) {
-    serverside.setSimplePrefAndSave({ path: field, value: rootState.config[oldField ?? field] })
-  }
-}
-*/
-
-export const declarations = [
-  {
-    field: 'muteFilters',
-    store: 'server-side',
-    migrationFlag: 'configMigration',
-    migrationNum: 1,
-    description: 'Mute filters, wordfilter/regexp/etc',
-    valueType: 'complex',
-    migration: async (serverside, rootState) => {
-      const vuexState = (await storage.getItem('vuex-lz')) ?? {}
-
-      vuexState.config?.muteWords?.forEach((word, order) => {
-        const uniqueId = uuidv4()
-
-        serverside.setPreference({
-          path: 'simple.muteFilters.' + uniqueId,
-          value: {
-            type: 'word',
-            value: word,
-            name: word,
-            enabled: true,
-            expires: null,
-            hide: false,
-            order,
-          },
-        })
-      })
-    },
-  },
-]
diff --git a/src/modules/default_config_state.js b/src/modules/default_config_state.js
index b3e14c70a..5f797126d 100644
--- a/src/modules/default_config_state.js
+++ b/src/modules/default_config_state.js
@@ -531,18 +531,17 @@ export const INSTANCE_DEFAULT_CONFIG_DEFINITIONS = {
     type: 'string',
     required: false,
   },
-  theme3hacks: {
-    description: 'Theme 3 hacks (need separation)',
-    type: 'object',
-    required: false,
-    default: {},
-  },
   highlights: {
     description: 'User highlights',
     type: 'object',
     required: false,
     default: {},
   },
+  underlay: {
+    description: 'Underlay override',
+    required: true,
+    default: 'none',
+  },
 }
 export const INSTANCE_DEFAULT_CONFIG = convertDefinitions(
   INSTANCE_DEFAULT_CONFIG_DEFINITIONS,
@@ -634,11 +633,6 @@ export const LOCAL_DEFAULT_CONFIG_DEFINITIONS = {
     description: 'Streaming API (WebSocket)',
     default: false,
   },
-  underlay: {
-    description: 'Underlay override',
-    required: true,
-    default: 'none',
-  },
   fontInterface: {
     description: 'Interface font override',
     type: 'object',
@@ -766,6 +760,7 @@ export const validateSetting = ({
   if (value === undefined) return undefined // only null is allowed as missing value
   if (definition === undefined) return undefined // invalid definition
   const path = fullPath.replace(/^simple./, '')
+  const depth = path.split('.')
   if (
     validateObjects &&
     definition.type === 'object' &&
@@ -777,12 +772,6 @@ export const validateSetting = ({
     return undefined
   }
 
-  if (path.includes('muteFilters')) {
-    console.log('##', path, value, definition)
-    console.log(value)
-    console.log(path)
-    console.log('====')
-  }
   if (get(defaultState, path.split('.')[0]) === undefined) {
     const string = `Unknown option ${fullPath}, value: ${value}`
 
diff --git a/src/modules/users.js b/src/modules/users.js
index 8b2a991c5..db5b16ccc 100644
--- a/src/modules/users.js
+++ b/src/modules/users.js
@@ -30,8 +30,6 @@ import { useOAuthStore } from 'src/stores/oauth.js'
 import { useSyncConfigStore } from 'src/stores/sync_config.js'
 import { useUserHighlightStore } from 'src/stores/user_highlight.js'
 
-import { declarations } from 'src/modules/config_declaration'
-
 // TODO: Unify with mergeOrAdd in statuses.js
 export const mergeOrAdd = (arr, obj, item) => {
   if (!item) {
@@ -742,25 +740,6 @@ const users = {
               useSyncConfigStore().setFlag({ flag: 'configMigration', value: 0 })
               /**/
 
-              const { configMigration } = useSyncConfigStore().flagStorage
-              declarations
-                .filter((x) => {
-                  return (
-                    x.store === 'server-side' &&
-                    x.migrationNum > 0 &&
-                    x.migrationNum > configMigration
-                  )
-                })
-                .toSorted((a, b) => a.configMigration - b.configMigration)
-                .forEach((value) => {
-                  value.migration(useSyncConfigStore(), store.rootState)
-                  useSyncConfigStore().setFlag({
-                    flag: 'configMigration',
-                    value: value.migrationNum,
-                  })
-                  useSyncConfigStore().pushSyncConfig()
-                })
-
               if (user.token) {
                 dispatch('setWsToken', user.token)
 
diff --git a/src/stores/sync_config.js b/src/stores/sync_config.js
index 871d09e14..d5a5298be 100644
--- a/src/stores/sync_config.js
+++ b/src/stores/sync_config.js
@@ -14,6 +14,7 @@ import {
   uniqWith,
   unset,
 } from 'lodash'
+import { v4 as uuidv4 } from 'uuid'
 import { defineStore } from 'pinia'
 import { toRaw } from 'vue'
 
@@ -676,21 +677,24 @@ export const useSyncConfigStore = defineStore('sync_config', {
       // Various migrations
       console.debug('Migrating from old config')
       const vuexState = (await storage.getItem('vuex-lz')) ?? {}
-      vuexState.config = vuexState.config ?? {}
+      const config = vuexState.config ?? {}
 
-      const migratedEntries = new Set(vuexState.config._syncMigration ?? [])
+      const migratedEntries = new Set(config._syncMigration ?? [])
       console.debug(
         `Already migrated Values: ${[...migratedEntries].join() || '[none]'}`,
       )
 
+      const { configMigration } = useSyncConfigStore().flagStorage
+
       Object.entries(oldDefaultConfigSync).forEach(([key, value]) => {
-        const oldValue = vuexState.config[key]
+        const oldValue = config[key]
         const defaultValue = value
 
         const present = oldValue !== undefined
         const migrated = migratedEntries.has(key)
         const different = !isEqual(oldValue, defaultValue)
 
+        console.log(key, oldValue)
         if (present && !migrated && different) {
           console.debug(`Migrating config ${key}: ${oldValue}`)
           if (key === 'theme3hacks') {
@@ -710,10 +714,27 @@ export const useSyncConfigStore = defineStore('sync_config', {
               path: 'fontMonospace',
               value: oldValue.fonts.monospace,
             })
-            useLocalConfigStore().set({
+            useSyncConfigStore().set({
               path: 'underlay',
               value: oldValue.underlay,
             })
+          } else if (key == 'muteWords') {
+            oldValue.forEach((word, order) => {
+              const uniqueId = uuidv4()
+
+              useSyncConfigStore().setPreference({
+                path: 'simple.muteFilters.' + uniqueId,
+                value: {
+                  type: 'word',
+                  value: word,
+                  name: word,
+                  enabled: true,
+                  expires: null,
+                  hide: false,
+                  order,
+                },
+              })
+            })
           } else {
             this.setPreference({ path: `simple.${key}`, value: oldValue })
           }
@@ -722,8 +743,9 @@ export const useSyncConfigStore = defineStore('sync_config', {
         }
       })
 
-      vuexState.config._syncMigration = [...migratedEntries]
-      storage.setItem('vuex-lz', vuexState)
+      config._syncMigration = [...migratedEntries]
+      vuexState.config = config
+      //storage.setItem('vuex-lz', vuexState)
 
       if (!needUpload && recent && stale) {
         console.debug('Checking if data needs merging...')