LDAP app install fails

if i try to install the official LDAP app i get the following error message:
"An exception occurred while executing 'CREATE TABLE oc_ldap_user_mapping (ldap_dn VARCHAR(255) DEFAULT '' NOT NULL, owncloud_name VARCHAR(255) DEFAULT '' NOT NULL, directory_uuid VARCHAR(255) DEFAULT '' NOT NULL, UNIQUE INDEX ldap_dn_users (ldap_dn), PRIMARY KEY(owncloud_name)) DEFAULT CHARACTER SET utf8 COLLATE utf8_bin ENGINE = InnoDB': SQLSTATE[42S01]: Base table or view already exists: 1050 Table 'oc_ldap_user_mapping' already exists"

Server configuration
Operating system: SLES 12 SP2
Web server: apache2.4
Database: MariaDB
PHP version: 5.5
ownCloud version (see ownCloud admin page): 9.1
Updated from an older ownCloud or fresh install: fresh install
Special configuration (external storage, external authentication, reverse proxy, server-side-encryption): nothing known to me

Any help is appreciated.