Error creating chart

Hi

I'm trying to create a simple chart.

Steps to replicate

1. Added chart field to my content type.
2. Created a new node.
3. Gave chart a title.
4. Selected 'barchart' as type
5. Added 'y' data: 'giraffes', 'orangutans', 'monkeys'
6. Added 'x' data: 4, 5 , 6

Expected result:

A chart!

Actual result:

'Error: Unable to save form; the number of fields exceeds the limit set on your server. The current limit is 1000, and this form has 1125 fields. Please increase your allowed number of input variables by adjusting max_input_vars, or reduce the number of form fields by removing unnecessary fields from the plot templateemplate definition. See http://php.net/manual/en/info.configuration.php#ini.max-input-vars for more information.'