Too many layers for this version of photoshop

Hi,

I created a huge photoshop file with approximately 3800 or more text layers. Now, when I want to add a new text layer it says: "Could not use the type tool because there are too many layers for this version of Photoshop". 

How can I solve this problem? I use Photoshop CC 2015. I saved file as PSD, the saved as PSB, but still nothing changed.