After update product page getting error in function.php file

Hi,

I am using WordPress with woocommerce product, Where when i update any product i get below error:

Function register_taxonomy was called incorrectly. Taxonomy names must be between 1 and 32 characters in length. Please see Debugging in WordPress for more information. (This message was added in version 4.2.0.) in /home/u498051794/domains/smartphonesarena.net/public_html/wp-includes/functions.php on line 5903

I checked this file in my hosting c panel and found this piece of code

trigger_error(
            sprintf(
                /* translators: Developer debugging message. 1: PHP function name, 2: Explanatory message, 3: WordPress version number. */
                __( 'Function %1$s was called <strong>incorrectly</strong>. %2$s %3$s' ),
                $function_name,
                $message,
                $version
            ),
            E_USER_NOTICE
        );

Kindly check and suggest.

Thanks,

Vikash