fix: migration error for new installs

server/db/migrations-sqlite/2.5.1.js

@@ -1,9 +1,20 @@
 exports.up = async knex => {
-  await knex('authentication').where('isEnabled', false).del()
+  // Check for users using disabled strategies
+  let protectedStrategies = []
+  const disabledStrategies = await knex('authentication').where('isEnabled', false)
+  if (disabledStrategies) {
+    const incompatibleUsers = await knex('users').distinct('providerKey').whereIn('providerKey', disabledStrategies.map(s => s.key))
+    if (incompatibleUsers && incompatibleUsers.length > 0) {
+      protectedStrategies = incompatibleUsers.map(u => u.providerKey)
+    }
+  }
 
+  // Delete disabled strategies
+  await knex('authentication').whereNotIn('key', protectedStrategies).andWhere('isEnabled', false).del()
+
+  // Update table schema
   await knex.schema
     .alterTable('authentication', table => {
-      table.dropColumn('isEnabled')
       table.integer('order').unsigned().notNullable().defaultTo(0)
       table.string('strategyKey').notNullable().defaultTo('')
       table.string('displayName').notNullable().defaultTo('')