Poster: Block spills over column: Should I write "continued"?
If you really must split your block, I would recommending to make it clear that you did, e.g., by repeating the title (if your blocks have such a thing) on the second block and appending (continued) to it. Alternatively, you can enumerate the two blocks, e.g., Framework I and Framework II.

However, if any possible, try to avoid the whole situation, e.g., by:


Rearranging exchangeable blocks such that you do not have to split a block. At the very least, you can place the block with references and acknowledgements (if you have one) almost everywhere.
Split your block at a structurally feasible point and give the second part a different title.
Change the layout of your poster completely. For example, make some columns wider and some thinner, switch between portrait and landscape (if the conference gave no recommendation in this respect) or make the layout row-based intstead of column-based.