Slim Application Error

The application could not run because of the following error:

Details

Type: PDOException
Code: 42000
Message: SQLSTATE[42000]: Syntax error or access violation: 1064 You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near '-30,30' at line 10
File: /home/direct36/public_html/tenoriobarato.com.mx/app/modelos/ProductosModelo.php
Line: 126

Trace

#0 /home/direct36/public_html/tenoriobarato.com.mx/app/modelos/ProductosModelo.php(126): PDOStatement->execute()
#1 /home/direct36/public_html/tenoriobarato.com.mx/index.php(70): ProductosModelo->porCategoria(NULL, -30, '30', 1)
#2 [internal function]: {closure}('Rec\xEF\xBF\xBD\xEF\xBF\xBDmaras', 'todas', '0', '30')
#3 /home/direct36/public_html/tenoriobarato.com.mx/vendor/slim/slim/Slim/Route.php(454): call_user_func_array(Object(Closure), Array)
#4 /home/direct36/public_html/tenoriobarato.com.mx/vendor/slim/slim/Slim/Slim.php(1316): Slim\Route->dispatch()
#5 /home/direct36/public_html/tenoriobarato.com.mx/vendor/slim/slim/Slim/Middleware/Flash.php(85): Slim\Slim->call()
#6 /home/direct36/public_html/tenoriobarato.com.mx/vendor/slim/slim/Slim/Middleware/MethodOverride.php(92): Slim\Middleware\Flash->call()
#7 /home/direct36/public_html/tenoriobarato.com.mx/vendor/slim/slim/Slim/Middleware/SessionCookie.php(110): Slim\Middleware\MethodOverride->call()
#8 /home/direct36/public_html/tenoriobarato.com.mx/vendor/slim/slim/Slim/Middleware/PrettyExceptions.php(67): Slim\Middleware\SessionCookie->call()
#9 /home/direct36/public_html/tenoriobarato.com.mx/vendor/slim/slim/Slim/Slim.php(1263): Slim\Middleware\PrettyExceptions->call()
#10 /home/direct36/public_html/tenoriobarato.com.mx/index.php(180): Slim\Slim->run()
#11 {main}