diff --git a/dataprovider/dataprovider.go b/dataprovider/dataprovider.go
index 73c3914b..cf07f549 100644
--- a/dataprovider/dataprovider.go
+++ b/dataprovider/dataprovider.go
@@ -80,7 +80,7 @@ const (
 	operationAdd              = "add"
 	operationUpdate           = "update"
 	operationDelete           = "delete"
-	sqlPrefixValidChars       = "abcdefghijklmnopqrstuvwxyz_"
+	sqlPrefixValidChars       = "abcdefghijklmnopqrstuvwxyz_0123456789"
 )
 
 // ordering constants
@@ -511,10 +511,10 @@ func validateHooks() error {
 }
 
 func validateSQLTablesPrefix() error {
-	if len(config.SQLTablesPrefix) > 0 {
+	if config.SQLTablesPrefix != "" {
 		for _, char := range config.SQLTablesPrefix {
 			if !strings.Contains(sqlPrefixValidChars, strings.ToLower(string(char))) {
-				return errors.New("invalid sql_tables_prefix only chars in range 'a..z', 'A..Z' and '_' are allowed")
+				return errors.New("invalid sql_tables_prefix only chars in range 'a..z', 'A..Z', '0-9' and '_' are allowed")
 			}
 		}
 		sqlTableUsers = config.SQLTablesPrefix + sqlTableUsers
diff --git a/dataprovider/mysql.go b/dataprovider/mysql.go
index c79a0b50..8379c37b 100644
--- a/dataprovider/mysql.go
+++ b/dataprovider/mysql.go
@@ -36,9 +36,9 @@ const (
 		"`last_login` bigint NOT NULL, `filters` longtext NULL, `filesystem` longtext NULL, `additional_info` longtext NULL);" +
 		"CREATE TABLE `{{folders_mapping}}` (`id` integer AUTO_INCREMENT NOT NULL PRIMARY KEY, `virtual_path` varchar(512) NOT NULL, " +
 		"`quota_size` bigint NOT NULL, `quota_files` integer NOT NULL, `folder_id` integer NOT NULL, `user_id` integer NOT NULL);" +
-		"ALTER TABLE `{{folders_mapping}}` ADD CONSTRAINT `unique_mapping` UNIQUE (`user_id`, `folder_id`);" +
-		"ALTER TABLE `{{folders_mapping}}` ADD CONSTRAINT `folders_mapping_folder_id_fk_folders_id` FOREIGN KEY (`folder_id`) REFERENCES `{{folders}}` (`id`) ON DELETE CASCADE;" +
-		"ALTER TABLE `{{folders_mapping}}` ADD CONSTRAINT `folders_mapping_user_id_fk_users_id` FOREIGN KEY (`user_id`) REFERENCES `{{users}}` (`id`) ON DELETE CASCADE;" +
+		"ALTER TABLE `{{folders_mapping}}` ADD CONSTRAINT `{{prefix}}unique_mapping` UNIQUE (`user_id`, `folder_id`);" +
+		"ALTER TABLE `{{folders_mapping}}` ADD CONSTRAINT `{{prefix}}folders_mapping_folder_id_fk_folders_id` FOREIGN KEY (`folder_id`) REFERENCES `{{folders}}` (`id`) ON DELETE CASCADE;" +
+		"ALTER TABLE `{{folders_mapping}}` ADD CONSTRAINT `{{prefix}}folders_mapping_user_id_fk_users_id` FOREIGN KEY (`user_id`) REFERENCES `{{users}}` (`id`) ON DELETE CASCADE;" +
 		"INSERT INTO {{schema_version}} (version) VALUES (8);"
 	mysqlV9SQL = "ALTER TABLE `{{admins}}` ADD COLUMN `description` varchar(512) NULL;" +
 		"ALTER TABLE `{{folders}}` ADD COLUMN `description` varchar(512) NULL;" +
@@ -228,6 +228,7 @@ func (p *MySQLProvider) initializeDatabase() error {
 	initialSQL = strings.ReplaceAll(initialSQL, "{{folders}}", sqlTableFolders)
 	initialSQL = strings.ReplaceAll(initialSQL, "{{users}}", sqlTableUsers)
 	initialSQL = strings.ReplaceAll(initialSQL, "{{folders_mapping}}", sqlTableFoldersMapping)
+	initialSQL = strings.ReplaceAll(initialSQL, "{{prefix}}", config.SQLTablesPrefix)
 
 	return sqlCommonExecSQLAndUpdateDBVersion(p.dbHandle, strings.Split(initialSQL, ";"), 8)
 }
diff --git a/dataprovider/pgsql.go b/dataprovider/pgsql.go
index df490fad..7192586a 100644
--- a/dataprovider/pgsql.go
+++ b/dataprovider/pgsql.go
@@ -36,13 +36,13 @@ CREATE TABLE "{{users}}" ("id" serial NOT NULL PRIMARY KEY, "status" integer NOT
 "additional_info" text NULL);
 CREATE TABLE "{{folders_mapping}}" ("id" serial NOT NULL PRIMARY KEY, "virtual_path" varchar(512) NOT NULL,
 "quota_size" bigint NOT NULL, "quota_files" integer NOT NULL, "folder_id" integer NOT NULL, "user_id" integer NOT NULL);
-ALTER TABLE "{{folders_mapping}}" ADD CONSTRAINT "unique_mapping" UNIQUE ("user_id", "folder_id");
-ALTER TABLE "{{folders_mapping}}" ADD CONSTRAINT "folders_mapping_folder_id_fk_folders_id"
+ALTER TABLE "{{folders_mapping}}" ADD CONSTRAINT "{{prefix}}unique_mapping" UNIQUE ("user_id", "folder_id");
+ALTER TABLE "{{folders_mapping}}" ADD CONSTRAINT "{{prefix}}folders_mapping_folder_id_fk_folders_id"
 FOREIGN KEY ("folder_id") REFERENCES "{{folders}}" ("id") MATCH SIMPLE ON UPDATE NO ACTION ON DELETE CASCADE DEFERRABLE INITIALLY DEFERRED;
-ALTER TABLE "{{folders_mapping}}" ADD CONSTRAINT "folders_mapping_user_id_fk_users_id"
+ALTER TABLE "{{folders_mapping}}" ADD CONSTRAINT "{{prefix}}folders_mapping_user_id_fk_users_id"
 FOREIGN KEY ("user_id") REFERENCES "{{users}}" ("id") MATCH SIMPLE ON UPDATE NO ACTION ON DELETE CASCADE DEFERRABLE INITIALLY DEFERRED;
-CREATE INDEX "folders_mapping_folder_id_idx" ON "{{folders_mapping}}" ("folder_id");
-CREATE INDEX "folders_mapping_user_id_idx" ON "{{folders_mapping}}" ("user_id");
+CREATE INDEX "{{prefix}}folders_mapping_folder_id_idx" ON "{{folders_mapping}}" ("folder_id");
+CREATE INDEX "{{prefix}}folders_mapping_user_id_idx" ON "{{folders_mapping}}" ("user_id");
 INSERT INTO {{schema_version}} (version) VALUES (8);
 `
 	pgsqlV9SQL = `ALTER TABLE "{{admins}}" ADD COLUMN "description" varchar(512) NULL;
@@ -235,6 +235,7 @@ func (p *PGSQLProvider) initializeDatabase() error {
 	initialSQL = strings.ReplaceAll(initialSQL, "{{folders}}", sqlTableFolders)
 	initialSQL = strings.ReplaceAll(initialSQL, "{{users}}", sqlTableUsers)
 	initialSQL = strings.ReplaceAll(initialSQL, "{{folders_mapping}}", sqlTableFoldersMapping)
+	initialSQL = strings.ReplaceAll(initialSQL, "{{prefix}}", config.SQLTablesPrefix)
 	if config.Driver == CockroachDataProviderName {
 		// Cockroach does not support deferrable constraint validation, we don't need it,
 		// we keep these definitions for the PostgreSQL driver to avoid changes for users
diff --git a/dataprovider/sqlite.go b/dataprovider/sqlite.go
index 396d89f0..68a38af9 100644
--- a/dataprovider/sqlite.go
+++ b/dataprovider/sqlite.go
@@ -38,9 +38,9 @@ CREATE TABLE "{{users}}" ("id" integer NOT NULL PRIMARY KEY AUTOINCREMENT, "user
 CREATE TABLE "{{folders_mapping}}" ("id" integer NOT NULL PRIMARY KEY AUTOINCREMENT, "virtual_path" varchar(512) NOT NULL,
 "quota_size" bigint NOT NULL, "quota_files" integer NOT NULL, "folder_id" integer NOT NULL REFERENCES "{{folders}}" ("id")
 ON DELETE CASCADE DEFERRABLE INITIALLY DEFERRED, "user_id" integer NOT NULL REFERENCES "{{users}}" ("id") ON DELETE CASCADE DEFERRABLE INITIALLY DEFERRED,
-CONSTRAINT "unique_mapping" UNIQUE ("user_id", "folder_id"));
-CREATE INDEX "folders_mapping_folder_id_idx" ON "{{folders_mapping}}" ("folder_id");
-CREATE INDEX "folders_mapping_user_id_idx" ON "{{folders_mapping}}" ("user_id");
+CONSTRAINT "{{prefix}}unique_mapping" UNIQUE ("user_id", "folder_id"));
+CREATE INDEX "{{prefix}}folders_mapping_folder_id_idx" ON "{{folders_mapping}}" ("folder_id");
+CREATE INDEX "{{prefix}}folders_mapping_user_id_idx" ON "{{folders_mapping}}" ("user_id");
 INSERT INTO {{schema_version}} (version) VALUES (8);
 `
 	sqliteV9SQL = `ALTER TABLE "{{admins}}" ADD COLUMN "description" varchar(512) NULL;
@@ -249,6 +249,7 @@ func (p *SQLiteProvider) initializeDatabase() error {
 	initialSQL = strings.ReplaceAll(initialSQL, "{{folders}}", sqlTableFolders)
 	initialSQL = strings.ReplaceAll(initialSQL, "{{users}}", sqlTableUsers)
 	initialSQL = strings.ReplaceAll(initialSQL, "{{folders_mapping}}", sqlTableFoldersMapping)
+	initialSQL = strings.ReplaceAll(initialSQL, "{{prefix}}", config.SQLTablesPrefix)
 
 	return sqlCommonExecSQLAndUpdateDBVersion(p.dbHandle, []string{initialSQL}, 8)
 }