is one piece episode 239 filler?

After getting up, Franky is surprised to hear that Iceburg has been shot while Nami is shocked to hear that Galley-La is blaming them for the attempted murder. Luffy yells out that they haven't shot anybody but Paulie doesn't believe him.

Paulie then says that Iceburg explained that two people attacked him: a tall man with a mask and the other being Nico Robin. Luffy and Nami are extremely shocked to hear this while Paulie thinks that she and the rest of the Straw Hat Pirates came to Water 7 just to murder Iceburg.