#vulnerable code 
                                public boolean tryLoadProtection(Block block) {
        Protection protection = lwc.getPhysicalDatabase().loadProtection(block.getWorld().getName(), block.getX(), block.getY(), block.getZ());

        if (protection != null) {
            // ensure it's the right block
            if (protection.getBlockId() > 0) {
                if (protection.getBlockId() == protection.getBlock().getTypeId()) {
                    this.matchedProtection = protection;
                } else {
                    // Corrupted protection
                    System.out.println("Removing corrupted protection: " + protection);
                    protection.remove();
                }
            }
        }

        return this.matchedProtection != null;
    } 
                            #location 7 
                            #vulnerability type NULL_DEREFERENCE
#fixed code
                                public boolean tryLoadProtection(Block block) {
        Protection protection = lwc.getPhysicalDatabase().loadProtection(block.getWorld().getName(), block.getX(), block.getY(), block.getZ());

        if (protection != null) {
            // ensure it's the right block
            if (protection.getBlockId() > 0) {
                if (protection.isBlockInWorld()) {
                    this.matchedProtection = protection;
                } else {
                    // Corrupted protection
                    System.out.println("Removing corrupted protection: " + protection);
                    protection.remove();
                }
            }
        }

        return this.matchedProtection != null;
    }