Unable to insert submersible pump into 410 feet borewell; stuck at 245 feet - What should I do? What is the solution?

We got a 410 ft borewell drilled with the water source at 280 ft. We tried to insert a submersible pump on day 8. But there was problem in clearing the motor at 245 ft and it was getting stuck at that level. Hence the pump and the whole assembly had to be withdrawn.

What could be the problem? What is the best solution for it?

I am eagerly waiting for experts' comments.

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